Fix publish scripts

* XboxOne catalog.js model

* Split Catalog object, bump version

* Minor fixes

* Custom JsonConverter for launchPackage

* Make launchPackage an abstract object

* Don't ignore packages

* Fix field types for Catalog/Package

AACS/CopyrightRecord.cs

@@ -1,13 +1,17 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.AACS
 {
     /// <summary>
     /// This record type is undocumented but found in real media key blocks
     /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class CopyrightRecord : Record
     {
         /// <summary>
         /// Null-terminated ASCII string representing the copyright
         /// </summary>
-        public string? Copyright { get; set; }
+        [MarshalAs(UnmanagedType.LPStr)]
+        public string? Copyright;
     }
 }

AACS/DriveRevocationListEntry.cs

@@ -1,6 +1,9 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.AACS
 {
     /// <see href="https://aacsla.com/wp-content/uploads/2019/02/AACS_Spec_Common_Final_0953.pdf"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DriveRevocationListEntry
     {
         /// <summary>
@@ -9,13 +12,14 @@ namespace SabreTools.Models.AACS
         /// field indicates that only one ID is being revoked, a value of one
         /// in the Range field indicates two ID’s are being revoked, and so on.
         /// </summary>
-        public ushort Range { get; set; }
+        public ushort Range;
 
         /// <summary>
         /// A 6-byte Drive ID value identifying the Licensed Drive being revoked
         /// (or the first in a range of Licensed Drives being revoked, in the
         /// case of a non-zero Range value).
         /// </summary>
-        public byte[]? DriveID { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? DriveID;
     }
 }

AACS/HostRevocationListEntry.cs

@@ -1,6 +1,9 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.AACS
 {
     /// <see href="https://aacsla.com/wp-content/uploads/2019/02/AACS_Spec_Common_Final_0953.pdf"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class HostRevocationListEntry
     {
         /// <summary>
@@ -9,13 +12,14 @@ namespace SabreTools.Models.AACS
         /// field indicates that only one ID is being revoked, a value of one
         /// in the Range field indicates two ID’s are being revoked, and so on.
         /// </summary>
-        public ushort Range { get; set; }
+        public ushort Range;
 
         /// <summary>
         /// A 6-byte Host ID value identifying the host being revoked (or the
         /// first in a range of hosts being revoked, in the case of a non-zero
         /// Range value).
         /// </summary>
-        public byte[]? HostID { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? HostID;
     }
 }

AACS/SubsetDifference.cs

@@ -1,6 +1,9 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.AACS
 {
     /// <see href="https://aacsla.com/wp-content/uploads/2019/02/AACS_Spec_Common_Final_0953.pdf"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class SubsetDifference
     {
         /// <summary>
@@ -9,12 +12,12 @@ namespace SabreTools.Models.AACS
         /// the mask. For example, the value 0x01 denotes a mask of
         /// 0xFFFFFFFE; value 0x0A denotes a mask of 0xFFFFFC00.
         /// </summary>
-        public byte Mask { get; set; }
+        public byte Mask;
 
         /// <summary>
         /// The last 4 bytes are the uv number, most significant
         /// byte first.
         /// </summary>
-        public uint Number { get; set; }
+        public uint Number;
     }
 }

BFPK/Header.cs

@@ -1,24 +1,28 @@
-namespace SabreTools.Models.BFPK
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.BFPK
 {
     /// <summary>
     /// Header
     /// </summary>
     /// <see cref="https://forum.xentax.com/viewtopic.php?t=5102"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class Header
     {
         /// <summary>
         /// "BFPK"
         /// </summary>
-        public string? Magic { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? Magic;
 
         /// <summary>
         /// Version
         /// </summary>
-        public int Version { get; set; }
+        public int Version;
 
         /// <summary>
         /// Files
         /// </summary>
-        public int Files { get; set; }
+        public int Files;
     }
 }

BMP/BITMAPFILEHEADER.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.BMP
 {
     /// <summary>
@@ -5,31 +7,32 @@ namespace SabreTools.Models.BMP
     /// and layout of a file that contains a DIB.
     /// </summary>
     /// <see href="https://learn.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-bitmapfileheader"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class BITMAPFILEHEADER
     {
         /// <summary>
         /// The file type; must be BM.
         /// </summary>
-        public ushort Type { get; set; }
+        public ushort Type;
 
         /// <summary>
         /// The size, in bytes, of the bitmap file.
         /// </summary>
-        public uint Size { get; set; }
+        public uint Size;
 
         /// <summary>
         /// Reserved; must be zero.
         /// </summary>
-        public ushort Reserved1 { get; set; }
+        public ushort Reserved1;
 
         /// <summary>
         /// Reserved; must be zero.
         /// </summary>
-        public ushort Reserved2 { get; set; }
+        public ushort Reserved2;
 
         /// <summary>
         /// The offset, in bytes, from the beginning of the BITMAPFILEHEADER structure to the bitmap bits.
         /// </summary>
-        public uint OffBits { get; set; }
+        public uint OffBits;
     }
 }

BMP/BITMAPINFOHEADER.cs

@@ -1,9 +1,12 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.BMP
 {
     /// <summary>
     /// The BITMAPINFOHEADER structure contains information about the dimensions and
     /// color format of a device-independent bitmap (DIB).
     /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class BITMAPINFOHEADER
     {
         /// <summary>
@@ -11,12 +14,12 @@ namespace SabreTools.Models.BMP
         /// not include the size of the color table or the size of the color masks,
         /// if they are appended to the end of structure.
         /// </summary>
-        public uint Size { get; set; }
+        public uint Size;
 
         /// <summary>
         /// Specifies the width of the bitmap, in pixels.
         /// </summary>
-        public int Width { get; set; }
+        public int Width;
 
         /// <summary>
         /// Specifies the height of the bitmap, in pixels.
@@ -30,19 +33,19 @@ namespace SabreTools.Models.BMP
         ///   or negative biHeight.
         /// - For compressed formats, biHeight must be positive, regardless of image orientation.
         /// </summary>
-        public int Height { get; set; }
+        public int Height;
 
         /// <summary>
         /// Specifies the number of planes for the target device. This value must be set to 1.
         /// </summary>
-        public ushort Planes { get; set; }
+        public ushort Planes;
 
         /// <summary>
         /// Specifies the number of bits per pixel (bpp). For uncompressed formats, this value
         /// is the average number of bits per pixel. For compressed formats, this value is the
         /// implied bit depth of the uncompressed image, after the image has been decoded.
         /// </summary>
-        public ushort BitCount { get; set; }
+        public ushort BitCount;
 
         /// <summary>
         /// For compressed video and YUV formats, this member is a FOURCC code, specified as a
@@ -59,36 +62,36 @@ namespace SabreTools.Models.BMP
         /// If biCompression equals BI_BITFIELDS, the format is either RGB 555 or RGB 565. Use
         /// the subtype GUID in the AM_MEDIA_TYPE structure to determine the specific RGB type.
         /// </summary>
-        public uint Compression { get; set; }
+        public uint Compression;
 
         /// <summary>
         /// Specifies the size, in bytes, of the image. This can be set to 0 for uncompressed
         /// RGB bitmaps.
         /// </summary>
-        public uint SizeImage { get; set; }
+        public uint SizeImage;
 
         /// <summary>
         /// Specifies the horizontal resolution, in pixels per meter, of the target device for
         /// the bitmap.
         /// </summary>
-        public int XPelsPerMeter { get; set; }
+        public int XPelsPerMeter;
 
         /// <summary>
         /// Specifies the vertical resolution, in pixels per meter, of the target device for
         /// the bitmap.
         /// </summary>
-        public int YPelsPerMeter { get; set; }
+        public int YPelsPerMeter;
 
         /// <summary>
         /// Specifies the number of color indices in the color table that are actually used by
         /// the bitmap.
         /// </summary>
-        public uint ClrUsed { get; set; }
+        public uint ClrUsed;
 
         /// <summary>
         /// Specifies the number of color indices that are considered important for displaying
         /// the bitmap. If this value is zero, all colors are important.
         /// </summary>
-        public uint ClrImportant { get; set; }
+        public uint ClrImportant;
     }
 }

BSP/Header.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.BSP
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/BSPFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class Header
     {
         /// <summary>
         /// Version
         /// </summary>
-        public uint Version { get; set; }
+        public uint Version;
     }
 }

BSP/Lump.cs

@@ -1,16 +1,19 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.BSP
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/BSPFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class Lump
     {
         /// <summary>
         /// Offset
         /// </summary>
-        public uint Offset { get; set; }
+        public uint Offset;
 
         /// <summary>
         /// Length
         /// </summary>
-        public uint Length { get; set; }
+        public uint Length;
     }
 }

Compression/LZ/FileHeader.cs

@@ -1,17 +1,22 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.Compression.LZ
 {
     /// <summary>
     /// Format of first 14 byte of LZ compressed file
     /// </summary>
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/kernel32/lzexpand.c"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class FileHeaader
     {
-        public string? Magic { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
+        public string? Magic;
 
-        public byte CompressionType { get; set; }
+        public byte CompressionType;
 
-        public char LastChar { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public char LastChar;
 
-        public uint RealLength { get; set; }
+        public uint RealLength;
     }
 }

DVD/CellAddressTableEntry.cs

@@ -1,31 +1,34 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class CellAddressTableEntry
     {
         /// <summary>
         /// VOBidn
         /// </summary>
-        public ushort VOBIdentity { get; set; }
+        public ushort VOBIdentity;
 
         /// <summary>
         /// CELLidn
         /// </summary>
-        public byte CellIdentity { get; set; }
+        public byte CellIdentity;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte Reserved { get; set; }
+        public byte Reserved;
 
         /// <summary>
         /// Starting sector within VOB
         /// </summary>
-        public uint StartingSectorWithinVOB { get; set; }
+        public uint StartingSectorWithinVOB;
 
         /// <summary>
         /// Ending sector within VOB
         /// </summary>
-        public uint EndingSectorWithinVOB { get; set; }
+        public uint EndingSectorWithinVOB;
     }
 }

DVD/LanguageUnitTableEntry.cs

@@ -1,26 +1,29 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class LanguageUnitTableEntry
     {
         /// <summary>
         /// 	ISO639 language code
         /// </summary>
-        public ushort ISO639LanguageCode { get; set; }
+        public ushort ISO639LanguageCode;
 
         /// <summary>
         /// Reserved for language code extension
         /// </summary>
-        public byte Reserved { get; set; }
+        public byte Reserved;
 
         /// <summary>
         /// Menu existence flag [80 = title]
         /// </summary>
-        public byte MenuExistenceFlag { get; set; }
+        public byte MenuExistenceFlag;
 
         /// <summary>
         /// Offset to VMGM_LU, relative to VMGM_PGCI_UT
         /// </summary>
-        public uint LanguageUnitOffset { get; set; }
+        public uint LanguageUnitOffset;
     }
 }

DVD/ParentalManagementMasksTableEntry.cs

@@ -1,21 +1,24 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ParentalManagementMasksTableEntry
     {
         /// <summary>
         /// Country code
         /// </summary>
-        public ushort CountryCode { get; set; }
+        public ushort CountryCode;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        public ushort Reserved;
 
         /// <summary>
         /// Offset to PTL_MAIT
         /// </summary>
-        public uint Offset { get; set; }
+        public uint Offset;
     }
 }

DVD/ProgramChainTable.cs

@@ -11,7 +11,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        public ushort Reserved { get; set; }
 
         /// <summary>
         /// End address (last byte of last PGC in this LU)

DVD/ProgramChainTableEntry.cs

@@ -1,26 +1,30 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ProgramChainTableEntry
     {
         /// <summary>
         /// PGC category
         /// </summary>
-        public ProgramChainCategory Category { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ProgramChainCategory Category;
 
         /// <summary>
         /// Unknown
         /// </summary>
-        public byte Unknown { get; set; }
+        public byte Unknown;
 
         /// <summary>
         /// Parental management mask
         /// </summary>
-        public ushort ParentalManagementMask { get; set; }
+        public ushort ParentalManagementMask;
 
         /// <summary>
         /// Offset to VMGM_PGC, relative to VMGM_LU
         /// </summary>
-        public uint Offset { get; set; }
+        public uint Offset;
     }
 }

DVD/TitlesTable.cs

@@ -11,7 +11,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        public ushort Reserved { get; set; }
 
         /// <summary>
         /// End address (last byte of last entry)

DVD/TitlesTableEntry.cs

@@ -1,42 +1,46 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class TitlesTableEntry
     {
         /// <summary>
         /// Title type
         /// </summary>
-        public TitleType TitleType { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public TitleType TitleType;
 
         /// <summary>
         /// Number of angles
         /// </summary>
-        public byte NumberOfAngles { get; set; }
+        public byte NumberOfAngles;
 
         /// <summary>
         /// Number of chapters (PTTs)
         /// </summary>
-        public ushort NumberOfChapters { get; set; }
+        public ushort NumberOfChapters;
 
         /// <summary>
         /// Parental management mask
         /// </summary>
-        public ushort ParentalManagementMask { get; set; }
+        public ushort ParentalManagementMask;
 
         /// <summary>
         /// Video Title Set number (VTSN)
         /// </summary>
-        public byte VideoTitleSetNumber { get; set; }
+        public byte VideoTitleSetNumber;
 
         /// <summary>
         /// Title number within VTS (VTS_TTN)
         /// </summary>
-        public byte TitleNumberWithinVTS { get; set; }
+        public byte TitleNumberWithinVTS;
 
         /// <summary>
         /// Start sector for VTS, referenced to whole disk
         /// (video_ts.ifo starts at sector 00000000)
         /// </summary>
-        public uint VTSStartSector { get; set; }
+        public uint VTSStartSector;
     }
 }

DVD/VideoManagerIFO.cs

@@ -1,22 +1,27 @@
+using System.Drawing;
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo.html"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class VideoManagerIFO
     {
         /// <summary>
         /// "DVDVIDEO-VMG"
         /// </summary>
-        public string? Signature { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 12)]
+        public string? Signature;
 
         /// <summary>
         /// Last sector of VMG set (last sector of BUP)
         /// </summary>
-        public uint LastVMGSetSector { get; set; }
+        public uint LastVMGSetSector;
 
         /// <summary>
         /// Last sector of IFO
         /// </summary>
-        public uint LastIFOSector { get; set; }
+        public uint LastIFOSector;
 
         /// <summary>
         /// Version number
@@ -24,127 +29,132 @@ namespace SabreTools.Models.DVD
         /// - Byte 1, Bits 7-4 - Major version number
         /// - Byte 1, Bits 3-0 - Minor version number
         /// </summary>
-        public ushort VersionNumber { get; set; }
+        public ushort VersionNumber;
 
         /// <summary>
         /// VMG category
         /// </summary>
         /// <remarks>byte1=prohibited region mask</remarks>
-        public uint VMGCategory { get; set; }
+        public uint VMGCategory;
 
         /// <summary>
         /// Number of volumes
         /// </summary>
-        public ushort NumberOfVolumes { get; set; }
+        public ushort NumberOfVolumes;
 
         /// <summary>
         /// Volume number
         /// </summary>
-        public ushort VolumeNumber { get; set; }
+        public ushort VolumeNumber;
 
         /// <summary>
         /// Side ID
         /// </summary>
-        public byte SideID { get; set; }
+        public byte SideID;
 
         /// <summary>
         /// Number of title sets
         /// </summary>
-        public ushort NumberOfTitleSets { get; set; }
+        public ushort NumberOfTitleSets;
 
         /// <summary>
         /// Provider ID
         /// </summary>
-        public byte[]? ProviderID { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
+        public byte[]? ProviderID;
 
         /// <summary>
         /// VMG POS
         /// </summary>
-        public ulong VMGPOS { get; set; }
+        public ulong VMGPOS;
 
         /// <summary>
         /// End byte address of VMGI_MAT
         /// </summary>
-        public uint InformationManagementTableEndByteAddress { get; set; }
+        public uint InformationManagementTableEndByteAddress;
 
         /// <summary>
         /// Start address of FP_PGC (First Play program chain)
         /// </summary>
-        public uint FirstPlayProgramChainStartAddress { get; set; }
+        public uint FirstPlayProgramChainStartAddress;
 
         /// <summary>
         /// Start sector of Menu VOB
         /// </summary>
-        public uint MenuVOBStartSector { get; set; }
+        public uint MenuVOBStartSector;
 
         /// <summary>
         /// Sector pointer to TT_SRPT (table of titles)
         /// </summary>
-        public uint TableOfTitlesSectorPointer { get; set; }
+        public uint TableOfTitlesSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMGM_PGCI_UT (Menu Program Chain table)
         /// </summary>
-        public uint MenuProgramChainTableSectorPointer { get; set; }
+        public uint MenuProgramChainTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMG_PTL_MAIT (Parental Management masks)
         /// </summary>
-        public uint ParentalManagementMasksSectorPointer { get; set; }
+        public uint ParentalManagementMasksSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMG_VTS_ATRT (copies of VTS audio/sub-picture attributes)
         /// </summary>
-        public uint AudioSubPictureAttributesSectorPointer { get; set; }
+        public uint AudioSubPictureAttributesSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMG_TXTDT_MG (text data)
         /// </summary>
-        public uint TextDataSectorPointer { get; set; }
+        public uint TextDataSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMGM_C_ADT (menu cell address table)
         /// </summary>
-        public uint MenuCellAddressTableSectorPointer { get; set; }
+        public uint MenuCellAddressTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMGM_VOBU_ADMAP (menu VOBU address map)
         /// </summary>
-        public uint MenuVOBUAddressMapSectorPointer { get; set; }
+        public uint MenuVOBUAddressMapSectorPointer;
 
         /// <summary>
         /// Video attributes of VMGM_VOBS
         /// </summary>
-        public byte[]? VideoAttributes { get; set; }
+        public ushort VideoAttributes;
 
         /// <summary>
         /// Number of audio streams in VMGM_VOBS
         /// </summary>
-        public ushort NumberOfAudioStreams { get; set; }
+        public ushort NumberOfAudioStreams;
 
         /// <summary>
         /// Audio attributes of VMGM_VOBS
         /// </summary>
-        public byte[][]? AudioAttributes { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public ulong[]? AudioAttributes;
 
         /// <summary>
         /// Unknown
         /// </summary>
-        public byte[]? Unknown { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+        public byte[]? Unknown;
 
         /// <summary>
         /// Number of subpicture streams in VMGM_VOBS (0 or 1)
         /// </summary>
-        public ushort NumberOfSubpictureStreams { get; set; }
+        public ushort NumberOfSubpictureStreams;
 
         /// <summary>
         /// Subpicture attributes of VMGM_VOBS
         /// </summary>
-        public byte[]? SubpictureAttributes { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? SubpictureAttributes;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 164)]
+        public byte[]? Reserved;
     }
 }

DVD/VideoTitleSetIFO.cs

@@ -1,22 +1,26 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo.html"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class VideoTitleSetIFO
     {
         /// <summary>
         /// "DVDVIDEO-VTS"
         /// </summary>
-        public string? Signature { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 12)]
+        public string? Signature;
 
         /// <summary>
         /// Last sector of title set (last sector of BUP)
         /// </summary>
-        public uint LastTitleSetSector { get; set; }
+        public uint LastTitleSetSector;
 
         /// <summary>
         /// Last sector of IFO
         /// </summary>
-        public uint LastIFOSector { get; set; }
+        public uint LastIFOSector;
 
         /// <summary>
         /// Version number
@@ -24,137 +28,142 @@ namespace SabreTools.Models.DVD
         /// - Byte 1, Bits 7-4 - Major version number
         /// - Byte 1, Bits 3-0 - Minor version number
         /// </summary>
-        public ushort VersionNumber { get; set; }
+        public ushort VersionNumber;
 
         /// <summary>
         /// VTS category
         /// </summary>
         /// <remarks>0=unspecified, 1=Karaoke</remarks>
-        public uint VMGCategory { get; set; }
+        public uint VMGCategory;
 
         /// <summary>
         /// Number of volumes
         /// </summary>
-        public ushort NumberOfVolumes { get; set; }
+        public ushort NumberOfVolumes;
 
         /// <summary>
         /// Volume number
         /// </summary>
-        public ushort VolumeNumber { get; set; }
+        public ushort VolumeNumber;
 
         /// <summary>
         /// Side ID
         /// </summary>
-        public byte SideID { get; set; }
+        public byte SideID;
 
         /// <summary>
         /// Number of title sets
         /// </summary>
-        public ushort NumberOfTitleSets { get; set; }
+        public ushort NumberOfTitleSets;
 
         /// <summary>
         /// Provider ID
         /// </summary>
-        public byte[]? ProviderID { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
+        public byte[]? ProviderID;
 
         /// <summary>
         /// VMG POS
         /// </summary>
-        public ulong VMGPOS { get; set; }
+        public ulong VMGPOS;
 
         /// <summary>
         /// End byte address of VTS_MAT
         /// </summary>
-        public uint InformationManagementTableEndByteAddress { get; set; }
+        public uint InformationManagementTableEndByteAddress;
 
         /// <summary>
         /// Start address of FP_PGC (First Play program chain)
         /// </summary>
-        public uint FirstPlayProgramChainStartAddress { get; set; }
+        public uint FirstPlayProgramChainStartAddress;
 
         /// <summary>
         /// Start sector of Menu VOB
         /// </summary>
-        public uint MenuVOBStartSector { get; set; }
+        public uint MenuVOBStartSector;
 
         /// <summary>
         /// Start sector of Title VOB
         /// </summary>
-        public uint TitleVOBStartSector { get; set; }
+        public uint TitleVOBStartSector;
 
         /// <summary>
         /// Sector pointer to VTS_PTT_SRPT (table of Titles and Chapters)
         /// </summary>
-        public uint TableOfTitlesAndChaptersSectorPointer { get; set; }
+        public uint TableOfTitlesAndChaptersSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTS_PGCI (Title Program Chain table)
         /// </summary>
-        public uint TitleProgramChainTableSectorPointer { get; set; }
+        public uint TitleProgramChainTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTSM_PGCI_UT (Menu Program Chain table)
         /// </summary>
-        public uint MenuProgramChainTableSectorPointer { get; set; }
+        public uint MenuProgramChainTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTS_TMAPTI (time map)
         /// </summary>
-        public uint TimeMapSectorPointer { get; set; }
+        public uint TimeMapSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTSM_C_ADT (menu cell address table)
         /// </summary>
-        public uint MenuCellAddressTableSectorPointer { get; set; }
+        public uint MenuCellAddressTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTSM_VOBU_ADMAP (menu VOBU address map)
         /// </summary>
-        public uint MenuVOBUAddressMapSectorPointer { get; set; }
+        public uint MenuVOBUAddressMapSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTS_C_ADT (title set cell address table)
         /// </summary>
-        public uint TitleSetCellAddressTableSectorPointer { get; set; }
+        public uint TitleSetCellAddressTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTS_VOBU_ADMAP (title set VOBU address map)
         /// </summary>
-        public uint TitleSetVOBUAddressMapSectorPointer { get; set; }
+        public uint TitleSetVOBUAddressMapSectorPointer;
 
         /// <summary>
         /// Video attributes of VTSM_VOBS
         /// </summary>
-        public byte[]? VideoAttributes { get; set; }
+        public ushort VideoAttributes;
 
         /// <summary>
         /// Number of audio streams in VTSM_VOBS
         /// </summary>
-        public ushort NumberOfAudioStreams { get; set; }
+        public ushort NumberOfAudioStreams;
 
         /// <summary>
         /// Audio attributes of VTSM_VOBS
         /// </summary>
-        public byte[][]? AudioAttributes { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public ulong[]? AudioAttributes;
 
         /// <summary>
         /// Unknown
         /// </summary>
-        public byte[]? Unknown { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+        public byte[]? Unknown;
 
         /// <summary>
         /// Number of subpicture streams in VTSM_VOBS (0 or 1)
         /// </summary>
-        public ushort NumberOfSubpictureStreams { get; set; }
+        public ushort NumberOfSubpictureStreams;
 
         /// <summary>
         /// Subpicture attributes of VTSM_VOBS
         /// </summary>
-        public byte[]? SubpictureAttributes { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? SubpictureAttributes;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 164)]
+        public byte[]? Reserved;
     }
 }

Delphi/Constants.cs

@@ -0,0 +1,14 @@
+/// <remarks>
+/// Information sourced from https://stackoverflow.com/questions/18720045/what-are-the-list-of-all-possible-values-for-dvclal
+/// </remarks>
+namespace SabreTools.Models.Delphi
+{
+    public static class Constants
+    {
+        public static readonly byte[] DVCLALStandard = [0x23, 0x78, 0x5D, 0x23, 0xB6, 0xA5, 0xF3, 0x19, 0x43, 0xF3, 0x40, 0x02, 0x26, 0xD1, 0x11, 0xC7];
+
+        public static readonly byte[] DVCLALProfessional = [0xA2, 0x8C, 0xDF, 0x98, 0x7B, 0x3C, 0x3A, 0x79, 0x26, 0x71, 0x3F, 0x09, 0x0F, 0x2A, 0x25, 0x17];
+
+        public static readonly byte[] DVCLALEnterprise = [0x26, 0x3D, 0x4F, 0x38, 0xC2, 0x82, 0x37, 0xB8, 0xF3, 0x24, 0x42, 0x03, 0x17, 0x9B, 0x3A, 0x83];
+    }
+}

Delphi/PackageInfoTable.cs

@@ -0,0 +1,14 @@
+/// <remarks>
+/// Information sourced from https://docwiki.embarcadero.com/Libraries/Alexandria/en/System.PackageInfoTable
+/// </remarks>
+namespace SabreTools.Models.Delphi
+{
+    public class PackageInfoTable
+    {
+        public int UnitCount { get; set; }
+
+        public PackageUnitEntry[]? UnitInfo { get; set; }
+
+        public PackageTypeInfo? TypeInfo { get; set; }
+    }
+}

Delphi/PackageTypeInfo.cs

@@ -0,0 +1,19 @@
+/// <remarks>
+/// Information sourced from https://docwiki.embarcadero.com/Libraries/Sydney/en/System.TPackageTypeInfo
+/// </remarks>
+namespace SabreTools.Models.Delphi
+{
+    public class PackageTypeInfo
+    {
+        public int TypeCount { get; set; }
+
+        /// <remarks>
+        /// System-dependent pointer type, assumed to be encoded for x86
+        /// </remarks>
+        public uint[]? TypeTable { get; set; }
+
+        public int UnitCount { get; set; }
+
+        public string[]? UnitNames { get; set; }
+    }
+}

Delphi/PackageUnitEntry.cs

@@ -0,0 +1,21 @@
+using System.Runtime.InteropServices;
+
+/// <remarks>
+/// Information sourced from https://docwiki.embarcadero.com/Libraries/Alexandria/en/System.PackageUnitEntry
+/// </remarks>
+namespace SabreTools.Models.Delphi
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public class PackageUnitEntry
+    {
+        /// <remarks>
+        /// System-dependent pointer type, assumed to be encoded for x86
+        /// </remarks>
+        public uint Init;
+
+        /// <remarks>
+        /// System-dependent pointer type, assumed to be encoded for x86
+        /// </remarks>
+        public uint FInit;
+    }
+}

GCF/BlockEntry.cs

@@ -1,41 +1,44 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class BlockEntry
     {
         /// <summary>
         /// Flags for the block entry.  0x200F0000 == Not used.
         /// </summary>
-        public uint EntryFlags { get; set; }
+        public uint EntryFlags;
 
         /// <summary>
         /// The offset for the data contained in this block entry in the file.
         /// </summary>
-        public uint FileDataOffset { get; set; }
+        public uint FileDataOffset;
 
         /// <summary>
         /// The length of the data in this block entry.
         /// </summary>
-        public uint FileDataSize { get; set; }
+        public uint FileDataSize;
 
         /// <summary>
         /// The offset to the first data block of this block entry's data.
         /// </summary>
-        public uint FirstDataBlockIndex { get; set; }
+        public uint FirstDataBlockIndex;
 
         /// <summary>
         /// The next block entry in the series.  (N/A if == BlockCount.)
         /// </summary>
-        public uint NextBlockEntryIndex { get; set; }
+        public uint NextBlockEntryIndex;
 
         /// <summary>
         /// The previous block entry in the series.  (N/A if == BlockCount.)
         /// </summary>
-        public uint PreviousBlockEntryIndex { get; set; }
+        public uint PreviousBlockEntryIndex;
 
         /// <summary>
         /// The offset of the block entry in the directory.
         /// </summary>
-        public uint DirectoryIndex { get; set; }
+        public uint DirectoryIndex;
     }
 }

GCF/BlockEntryHeader.cs

@@ -1,46 +1,49 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class BlockEntryHeader
     {
         /// <summary>
         /// Number of data blocks.
         /// </summary>
-        public uint BlockCount { get; set; }
+        public uint BlockCount;
 
         /// <summary>
         /// Number of data blocks that point to data.
         /// </summary>
-        public uint BlocksUsed { get; set; }
+        public uint BlocksUsed;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy2 { get; set; }
+        public uint Dummy2;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy3 { get; set; }
+        public uint Dummy3;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy4 { get; set; }
+        public uint Dummy4;
 
         /// <summary>
         /// Header checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

GCF/BlockEntryMap.cs

@@ -1,19 +1,22 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <remarks>
     /// Part of version 5 but not version 6.
     /// </remarks>
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class BlockEntryMap
     {
         /// <summary>
         /// The previous block entry.  (N/A if == BlockCount.)
         /// </summary>
-        public uint PreviousBlockEntryIndex { get; set; }
+        public uint PreviousBlockEntryIndex;
 
         /// <summary>
         /// The next block entry.  (N/A if == BlockCount.)
         /// </summary>
-        public uint NextBlockEntryIndex { get; set; }
+        public uint NextBlockEntryIndex;
     }
 }

GCF/BlockEntryMapHeader.cs

@@ -1,34 +1,37 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <remarks>
     /// Part of version 5 but not version 6.
     /// </remarks>
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class BlockEntryMapHeader
     {
         /// <summary>
         /// Number of data blocks.
         /// </summary>
-        public uint BlockCount { get; set; }
+        public uint BlockCount;
 
         /// <summary>
         /// Index of the first block entry.
         /// </summary>
-        public uint FirstBlockEntryIndex { get; set; }
+        public uint FirstBlockEntryIndex;
 
         /// <summary>
         /// Index of the last block entry.
         /// </summary>
-        public uint LastBlockEntryIndex { get; set; }
+        public uint LastBlockEntryIndex;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Header checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

GCF/ChecksumEntry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ChecksumEntry
     {
         /// <summary>
         /// Checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

GCF/ChecksumHeader.cs

@@ -1,16 +1,19 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ChecksumHeader
     {
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Size of LPGCFCHECKSUMHEADER & LPGCFCHECKSUMMAPHEADER & in bytes.
         /// </summary>
-        public uint ChecksumSize { get; set; }
+        public uint ChecksumSize;
     }
 }

GCF/ChecksumMapEntry.cs

@@ -1,16 +1,19 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ChecksumMapEntry
     {
         /// <summary>
         /// Number of checksums.
         /// </summary>
-        public uint ChecksumCount { get; set; }
+        public uint ChecksumCount;
 
         /// <summary>
         /// Index of first checksum.
         /// </summary>
-        public uint FirstChecksumIndex { get; set; }
+        public uint FirstChecksumIndex;
     }
 }

GCF/ChecksumMapHeader.cs

@@ -1,26 +1,29 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ChecksumMapHeader
     {
         /// <summary>
         /// Always 0x14893721
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
 
         /// <summary>
         /// Number of items.
         /// </summary>
-        public uint ItemCount { get; set; }
+        public uint ItemCount;
 
         /// <summary>
         /// Number of checksums.
         /// </summary>
-        public uint ChecksumCount { get; set; }
+        public uint ChecksumCount;
     }
 }

GCF/DataBlockHeader.cs

@@ -1,36 +1,39 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DataBlockHeader
     {
         /// <summary>
         /// GCF file version.  This field is not part of all file versions.
         /// </summary>
-        public uint LastVersionPlayed { get; set; }
+        public uint LastVersionPlayed;
 
         /// <summary>
         /// Number of data blocks.
         /// </summary>
-        public uint BlockCount { get; set; }
+        public uint BlockCount;
 
         /// <summary>
         /// Size of each data block in bytes.
         /// </summary>
-        public uint BlockSize { get; set; }
+        public uint BlockSize;
 
         /// <summary>
         /// Offset to first data block.
         /// </summary>
-        public uint FirstBlockOffset { get; set; }
+        public uint FirstBlockOffset;
 
         /// <summary>
         /// Number of data blocks that contain data.
         /// </summary>
-        public uint BlocksUsed { get; set; }
+        public uint BlocksUsed;
 
         /// <summary>
         /// Header checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

GCF/DirectoryCopyEntry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryCopyEntry
     {
         /// <summary>
         /// Index of the directory item.
         /// </summary>
-        public uint DirectoryIndex { get; set; }
+        public uint DirectoryIndex;
     }
 }

GCF/DirectoryHeader.cs

@@ -1,76 +1,79 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryHeader
     {
         /// <summary>
         /// Always 0x00000004
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Cache ID.
         /// </summary>
-        public uint CacheID { get; set; }
+        public uint CacheID;
 
         /// <summary>
         /// GCF file version.
         /// </summary>
-        public uint LastVersionPlayed { get; set; }
+        public uint LastVersionPlayed;
 
         /// <summary>
         /// Number of items in the directory.
         /// </summary>
-        public uint ItemCount { get; set; }
+        public uint ItemCount;
 
         /// <summary>
         /// Number of files in the directory.
         /// </summary>
-        public uint FileCount { get; set; }
+        public uint FileCount;
 
         /// <summary>
         /// Always 0x00008000.  Data per checksum?
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
 
         /// <summary>
         /// Size of lpGCFDirectoryEntries & lpGCFDirectoryNames & lpGCFDirectoryInfo1Entries & lpGCFDirectoryInfo2Entries & lpGCFDirectoryCopyEntries & lpGCFDirectoryLocalEntries in bytes.
         /// </summary>
-        public uint DirectorySize { get; set; }
+        public uint DirectorySize;
 
         /// <summary>
         /// Size of the directory names in bytes.
         /// </summary>
-        public uint NameSize { get; set; }
+        public uint NameSize;
 
         /// <summary>
         /// Number of Info1 entires.
         /// </summary>
-        public uint Info1Count { get; set; }
+        public uint Info1Count;
 
         /// <summary>
         /// Number of files to copy.
         /// </summary>
-        public uint CopyCount { get; set; }
+        public uint CopyCount;
 
         /// <summary>
         /// Number of files to keep local.
         /// </summary>
-        public uint LocalCount { get; set; }
+        public uint LocalCount;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy2 { get; set; }
+        public uint Dummy2;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy3 { get; set; }
+        public uint Dummy3;
 
         /// <summary>
         /// Header checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

GCF/DirectoryInfo1Entry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryInfo1Entry
     {
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
     }
 }

GCF/DirectoryInfo2Entry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryInfo2Entry
     {
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
     }
 }

GCF/DirectoryLocalEntry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryLocalEntry
     {
         /// <summary>
         /// Index of the directory item.
         /// </summary>
-        public uint DirectoryIndex { get; set; }
+        public uint DirectoryIndex;
     }
 }

GCF/DirectoryMapEntry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryMapEntry
     {
         /// <summary>
         /// Index of the first data block. (N/A if == BlockCount.)
         /// </summary>
-        public uint FirstBlockIndex { get; set; }
+        public uint FirstBlockIndex;
     }
 }

GCF/DirectoryMapHeader.cs

@@ -1,19 +1,22 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <remarks>
     /// Added in version 4 or version 5.
     /// </remarks>
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryMapHeader
     {
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Always 0x00000000
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
     }
 }

GCF/FragmentationMap.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class FragmentationMap
     {
         /// <summary>
         /// The index of the next data block.
         /// </summary>
-        public uint NextDataBlockIndex { get; set; }
+        public uint NextDataBlockIndex;
     }
 }

GCF/FragmentationMapHeader.cs

@@ -1,26 +1,29 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class FragmentationMapHeader
     {
         /// <summary>
         /// Number of data blocks.
         /// </summary>
-        public uint BlockCount { get; set; }
+        public uint BlockCount;
 
         /// <summary>
         /// The index of the first unused fragmentation map entry.
         /// </summary>
-        public uint FirstUnusedEntry { get; set; }
+        public uint FirstUnusedEntry;
 
         /// <summary>
         /// The block entry terminator; 0 = 0x0000ffff or 1 = 0xffffffff.
         /// </summary>
-        public uint Terminator { get; set; }
+        public uint Terminator;
 
         /// <summary>
         /// Header checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

GCF/Header.cs

@@ -1,61 +1,64 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.GCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/GCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class Header
     {
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint MajorVersion { get; set; }
+        public uint MajorVersion;
 
         /// <summary>
         /// GCF version number.
         /// </summary>
-        public uint MinorVersion { get; set; }
+        public uint MinorVersion;
 
         /// <summary>
         /// Cache ID
         /// </summary>
-        public uint CacheID { get; set; }
+        public uint CacheID;
 
         /// <summary>
         /// Last version played
         /// </summary>
-        public uint LastVersionPlayed { get; set; }
+        public uint LastVersionPlayed;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy2 { get; set; }
+        public uint Dummy2;
 
         /// <summary>
         /// Total size of GCF file in bytes.
         /// </summary>
-        public uint FileSize { get; set; }
+        public uint FileSize;
 
         /// <summary>
         /// Size of each data block in bytes.
         /// </summary>
-        public uint BlockSize { get; set; }
+        public uint BlockSize;
 
         /// <summary>
         /// Number of data blocks.
         /// </summary>
-        public uint BlockCount { get; set; }
+        public uint BlockCount;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy3 { get; set; }
+        public uint Dummy3;
     }
 }

InstallShieldArchiveV3/Directory.cs

@@ -1,10 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.InstallShieldArchiveV3
 {
     /// <see href="https://github.com/wfr/unshieldv3/blob/master/ISArchiveV3.cpp"/>
+    [StructLayout(LayoutKind.Sequential)]
     public class Directory
     {
-        public string? Name { get; set; }
+        [MarshalAs(UnmanagedType.BStr)]
+        public string? Name;
 
-        public ushort FileCount { get; set; }
+        public ushort FileCount;
     }
 }

InstallShieldArchiveV3/File.cs

@@ -1,32 +1,37 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.InstallShieldArchiveV3
 {
     /// <see href="https://github.com/wfr/unshieldv3/blob/master/ISArchiveV3.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public class File
     {
-        public byte VolumeEnd { get; set; }
+        public byte VolumeEnd;
 
-        public ushort Index { get; set; }
+        public ushort Index;
 
-        public uint UncompressedSize { get; set; }
+        public uint UncompressedSize;
 
-        public uint CompressedSize { get; set; }
+        public uint CompressedSize;
 
-        public uint Offset { get; set; }
+        public uint Offset;
 
-        public uint DateTime { get; set; }
+        public uint DateTime;
 
-        public uint Reserved0 { get; set; }
+        public uint Reserved0;
 
-        public ushort ChunkSize { get; set; }
+        public ushort ChunkSize;
 
-        public Attributes Attrib { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public Attributes Attrib;
 
-        public byte IsSplit { get; set; }
+        public byte IsSplit;
 
-        public byte Reserved1 { get; set; }
+        public byte Reserved1;
 
-        public byte VolumeStart { get; set; }
+        public byte VolumeStart;
 
-        public string? Name { get; set; }
+        [MarshalAs(UnmanagedType.AnsiBStr)]
+        public string? Name;
     }
 }

InstallShieldArchiveV3/Header.cs

@@ -1,50 +1,53 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.InstallShieldArchiveV3
 {
     /// <see href="https://github.com/wfr/unshieldv3/blob/master/ISArchiveV3.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public class Header
     {
-        public uint Signature1 { get; set; }
+        public uint Signature1;
 
-        public uint Signature2 { get; set; }
+        public uint Signature2;
 
-        public ushort Reserved0 { get; set; }
+        public ushort Reserved0;
 
-        public ushort IsMultivolume { get; set; }
+        public ushort IsMultivolume;
 
-        public ushort FileCount { get; set; }
+        public ushort FileCount;
 
-        public uint DateTime { get; set; }
+        public uint DateTime;
 
-        public uint CompressedSize { get; set; }
+        public uint CompressedSize;
 
-        public uint UncompressedSize { get; set; }
+        public uint UncompressedSize;
 
-        public uint Reserved1 { get; set; }
+        public uint Reserved1;
 
         /// <remarks>
         /// Set in first vol only, zero in subsequent vols
         /// </remarks>
-        public byte VolumeTotal { get; set; }
+        public byte VolumeTotal;
 
         /// <remarks>
         /// [1...n]
         /// </remarks>
-        public byte VolumeNumber { get; set; }
+        public byte VolumeNumber;
 
-        public byte Reserved2 { get; set; }
+        public byte Reserved2;
 
-        public uint SplitBeginAddress { get; set; }
+        public uint SplitBeginAddress;
 
-        public uint SplitEndAddress { get; set; }
+        public uint SplitEndAddress;
 
-        public uint TocAddress { get; set; }
+        public uint TocAddress;
 
-        public uint Reserved3 { get; set; }
+        public uint Reserved3;
 
-        public ushort DirCount { get; set; }
+        public ushort DirCount;
 
-        public uint Reserved4 { get; set; }
+        public uint Reserved4;
 
-        public uint Reserved5 { get; set; }
+        public uint Reserved5;
     }
 }

InstallShieldCabinet/CommonHeader.cs

@@ -1,31 +1,35 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.InstallShieldCabinet
 {
     /// <see href="https://github.com/twogood/unshield/blob/main/lib/cabfile.h"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class CommonHeader
     {
         /// <summary>
         /// "ISc("
         /// </summary>
-        public string? Signature { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? Signature;
 
         /// <summary>
         /// Encoded version
         /// </summary>
-        public uint Version { get; set; }
+        public uint Version;
 
         /// <summary>
         /// Volume information
         /// </summary>
-        public uint VolumeInfo { get; set; }
+        public uint VolumeInfo;
 
         /// <summary>
         /// Offset to cabinet descriptor
         /// </summary>
-        public uint DescriptorOffset { get; set; }
+        public uint DescriptorOffset;
 
         /// <summary>
         /// Cabinet descriptor size
         /// </summary>
-        public uint DescriptorSize { get; set; }
+        public uint DescriptorSize;
     }
 }

InstallShieldCabinet/Component.cs

@@ -33,7 +33,7 @@ namespace SabreTools.Models.InstallShieldCabinet
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved0 { get; set; }
+        public ushort Reserved0 { get; set; }
 
         /// <summary>
         /// Reserved offset
@@ -78,6 +78,7 @@ namespace SabreTools.Models.InstallShieldCabinet
         /// <summary>
         /// Reserved
         /// </summary>
+        /// <remarks>32 bytes</remarks>
         public byte[]? Reserved1 { get; set; }
 
         /// <summary>
@@ -93,11 +94,13 @@ namespace SabreTools.Models.InstallShieldCabinet
         /// <summary>
         /// Reserved
         /// </summary>
+        /// <remarks>28 bytes</remarks>
         public byte[]? Reserved2 { get; set; }
 
         /// <summary>
         /// Reserved
         /// </summary>
+        /// <remarks>2 bytes (<= v5), 1 byte (> v5)</remarks>
         public byte[]? Reserved3 { get; set; }
 
         /// <summary>

InstallShieldCabinet/Descriptor.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.InstallShieldCabinet
 {
     /// <see href="https://github.com/twogood/unshield/blob/main/lib/cabfile.h"/>
@@ -6,116 +8,118 @@ namespace SabreTools.Models.InstallShieldCabinet
         /// <summary>
         /// Offset to the descriptor strings
         /// </summary>
-        public uint StringsOffset { get; set; }
+        public uint StringsOffset;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved0 { get; set; }
+        public uint Reserved0;
 
         /// <summary>
         /// Offset to the component list
         /// </summary>
-        public uint ComponentListOffset { get; set; }
+        public uint ComponentListOffset;
 
         /// <summary>
         /// Offset to the file table
         /// </summary>
-        public uint FileTableOffset { get; set; }
+        public uint FileTableOffset;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved1 { get; set; }
+        public uint Reserved1;
 
         /// <summary>
         /// Size of the file table
         /// </summary>
-        public uint FileTableSize { get; set; }
+        public uint FileTableSize;
 
         /// <summary>
         /// Redundant size of the file table
         /// </summary>
-        public uint FileTableSize2 { get; set; }
+        public uint FileTableSize2;
 
         /// <summary>
         /// Number of directories
         /// </summary>
-        public ushort DirectoryCount { get; set; }
+        public ushort DirectoryCount;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved2 { get; set; }
+        public uint Reserved2;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved3 { get; set; }
+        public ushort Reserved3;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved4 { get; set; }
+        public uint Reserved4;
 
         /// <summary>
         /// Number of files
         /// </summary>
-        public uint FileCount { get; set; }
+        public uint FileCount;
 
         /// <summary>
         /// Redundant offset to the file table
         /// </summary>
-        public uint FileTableOffset2 { get; set; }
+        public uint FileTableOffset2;
 
         /// <summary>
         /// Number of component table infos
         /// </summary>
-        public ushort ComponentTableInfoCount { get; set; }
+        public ushort ComponentTableInfoCount;
 
         /// <summary>
         /// Offset to the component table
         /// </summary>
-        public uint ComponentTableOffset { get; set; }
+        public uint ComponentTableOffset;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved5 { get; set; }
+        public uint Reserved5;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved6 { get; set; }
+        public uint Reserved6;
 
         /// <summary>
         /// Offsets to the file groups
         /// </summary>
-        public uint[]? FileGroupOffsets { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 71)]
+        public uint[]? FileGroupOffsets;
 
         /// <summary>
         /// Offsets to the components
         /// </summary>
-        public uint[]? ComponentOffsets { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 71)]
+        public uint[]? ComponentOffsets;
 
         /// <summary>
         /// Offset to the setup types
         /// </summary>
-        public uint SetupTypesOffset { get; set; }
+        public uint SetupTypesOffset;
 
         /// <summary>
         /// Offset to the setup table
         /// </summary>
-        public uint SetupTableOffset { get; set; }
+        public uint SetupTableOffset;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved7 { get; set; }
+        public uint Reserved7;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved8 { get; set; }
+        public uint Reserved8;
     }
 }

LinearExecutable/FixupPageTableEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.LinearExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.LinearExecutable
 {
     /// <summary>
     /// The Fixup Page Table provides a simple mapping of a logical page number
@@ -15,6 +17,7 @@
     /// </summary>
     /// <see href="https://faydoc.tripod.com/formats/exe-LE.htm"/>
     /// <see href="http://www.edm2.com/index.php/LX_-_Linear_eXecutable_Module_Format_Description"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class FixupPageTableEntry
     {
         /// <summary>
@@ -28,6 +31,6 @@
         /// This field specifies the offset following the last fixup record in the
         /// fixup record table. This is the last entry in the fixup page table. (n + 1)
         /// </remarks>
-        public uint Offset { get; set; }
+        public uint Offset;
     }
 }

LinearExecutable/InformationBlock.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.LinearExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.LinearExecutable
 {
     /// <summary>
     /// The `information block` in the LE header contains the linker version number,
@@ -10,6 +12,7 @@
     /// </summary>
     /// <see href="https://faydoc.tripod.com/formats/exe-LE.htm"/>
     /// <see href="http://www.edm2.com/index.php/LX_-_Linear_eXecutable_Module_Format_Description"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class InformationBlock
     {
         /// <summary>
@@ -21,7 +24,8 @@
         /// The signature word is used by the loader to identify the EXE
         /// file as a valid 32-bit Linear Executable Module Format.
         /// </remarks>
-        public string? Signature { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 2)]
+        public string? Signature;
 
         /// <summary>
         /// Byte Ordering. 
@@ -29,7 +33,8 @@
         /// <remarks>
         /// This byte specifies the byte ordering for the linear EXE format.
         /// </remarks>
-        public ByteOrder ByteOrder { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ByteOrder ByteOrder;
 
         /// <summary>
         /// Word Ordering.
@@ -37,7 +42,8 @@
         /// <remarks>
         /// This byte specifies the Word ordering for the linear EXE format.
         /// </remarks>
-        public WordOrder WordOrder { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public WordOrder WordOrder;
 
         /// <summary>
         /// Linear EXE Format Level.
@@ -49,7 +55,7 @@
         /// future EXE file versions so that an appropriate error message may be
         /// displayed if an attempt is made to load them. 
         /// </remarks>
-        public uint ExecutableFormatLevel { get; set; }
+        public uint ExecutableFormatLevel;
 
         /// <summary>
         /// Module CPU Type.
@@ -57,7 +63,8 @@
         /// <remarks>
         /// This field specifies the type of CPU required by this module to run.
         /// </remarks>
-        public CPUType CPUType { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public CPUType CPUType;
 
         /// <summary>
         /// Module OS Type.
@@ -65,7 +72,8 @@
         /// <remarks>
         /// This field specifies the type of Operating system required to run this module.
         /// </remarks>
-        public OperatingSystem ModuleOS { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public OperatingSystem ModuleOS;
 
         /// <summary>
         /// Module version
@@ -74,12 +82,13 @@
         /// This is useful for differentiating between revisions of dynamic linked modules.
         /// This value is specified at link time by the user. 
         /// </remarks>
-        public uint ModuleVersion { get; set; }
+        public uint ModuleVersion;
 
         /// <summary>
         /// Module type flags
         /// </summary>
-        public ModuleFlags ModuleTypeFlags { get; set; }
+        [MarshalAs(UnmanagedType.U4)]
+        public ModuleFlags ModuleTypeFlags;
 
         /// <summary>
         /// Number of pages in module.
@@ -94,7 +103,7 @@
         /// EXE module. This is used to determine the size of the page information tables
         /// in the linear EXE module. 
         /// </remarks>
-        public uint ModuleNumberPages { get; set; }
+        public uint ModuleNumberPages;
 
         /// <summary>
         /// The Object number to which the Entry Address is relative.
@@ -109,7 +118,7 @@
         /// is set, then the object to which this field refers must be a 32-bit object (i.e.,
         /// the Big/Default bit must be set in the object flags; see below).
         /// </remarks>
-        public uint InitialObjectCS { get; set; }
+        public uint InitialObjectCS;
 
         /// <summary>
         /// Entry Address of module.
@@ -118,7 +127,7 @@
         /// The Entry Address is the starting address for program modules and the library
         /// initialization and Library termination address for library modules. 
         /// </remarks>
-        public uint InitialEIP { get; set; }
+        public uint InitialEIP;
 
         /// <summary>
         /// The Object number to which the ESP is relative.
@@ -128,7 +137,7 @@
         /// nonzero value for a program module to be correctly loaded. This field is ignored
         /// for a library module. 
         /// </remarks>
-        public uint InitialObjectSS { get; set; }
+        public uint InitialObjectSS;
 
         /// <summary>
         /// Starting stack address of module.
@@ -138,7 +147,7 @@
         /// value in this field indicates that the stack pointer is to be initialized to the
         /// highest address/offset in the object. This field is ignored for a library module. 
         /// </remarks>
-        public uint InitialESP { get; set; }
+        public uint InitialESP;
 
         /// <summary>
         /// The size of one page for this system.
@@ -148,7 +157,7 @@
         /// For the initial version of this linear EXE format the page size is 4Kbytes.
         /// (The 4K page size is specified by a value of 4096 in this field.)
         /// </remarks>
-        public uint MemoryPageSize { get; set; }
+        public uint MemoryPageSize;
 
         /// <summary>
         /// The shift left bits for page offsets.
@@ -162,7 +171,7 @@
         /// 512 byte (disk sector) basis. The default value for this field is 12 (decimal),
         /// which give a 4096 byte alignment. All other offsets are byte aligned.
         /// </remarks>
-        public uint BytesOnLastPage { get; set; }
+        public uint BytesOnLastPage;
 
         /// <summary>
         /// Total size of the fixup information in bytes.
@@ -174,7 +183,7 @@
         /// - Import Module name Table
         /// - Import Procedure Name Table
         /// </remarks>
-        public uint FixupSectionSize { get; set; }
+        public uint FixupSectionSize;
 
         /// <summary>
         /// Checksum for fixup information.
@@ -185,7 +194,7 @@
         /// not always loaded into main memory with the 'loader section'. If the checksum
         /// feature is not implemented, then the linker will set these fields to zero.
         /// </remarks>
-        public uint FixupSectionChecksum { get; set; }
+        public uint FixupSectionChecksum;
 
         /// <summary>
         /// Size of memory resident tables.
@@ -195,7 +204,7 @@
         /// for the module, while the module is in use. This total size includes all
         /// tables from the Object Table down to and including the Per-Page Checksum Table.
         /// </remarks>
-        public uint LoaderSectionSize { get; set; }
+        public uint LoaderSectionSize;
 
         /// <summary>
         /// Checksum for loader section.
@@ -205,7 +214,7 @@
         /// If the checksum feature is not implemented, then the linker will set these fields
         /// to zero.
         /// </remarks>
-        public uint LoaderSectionChecksum { get; set; }
+        public uint LoaderSectionChecksum;
 
         /// <summary>
         /// Object Table offset.
@@ -213,7 +222,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint ObjectTableOffset { get; set; }
+        public uint ObjectTableOffset;
 
         /// <summary>
         /// Object Table Count.
@@ -221,7 +230,7 @@
         /// <remarks>
         /// This defines the number of entries in Object Table.
         /// </remarks>
-        public uint ObjectTableCount { get; set; }
+        public uint ObjectTableCount;
 
         /// <summary>
         /// Object Page Table offset
@@ -229,7 +238,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint ObjectPageMapOffset { get; set; }
+        public uint ObjectPageMapOffset;
 
         /// <summary>
         /// Object Iterated Pages offset.
@@ -237,7 +246,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint ObjectIterateDataMapOffset { get; set; }
+        public uint ObjectIterateDataMapOffset;
 
         /// <summary>
         /// Resource Table offset
@@ -245,12 +254,12 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint ResourceTableOffset { get; set; }
+        public uint ResourceTableOffset;
 
         /// <summary>
         /// Number of entries in Resource Table.
         /// </summary>
-        public uint ResourceTableCount { get; set; }
+        public uint ResourceTableCount;
 
         /// <summary>
         /// Resident Name Table offset.
@@ -258,7 +267,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint ResidentNamesTableOffset { get; set; }
+        public uint ResidentNamesTableOffset;
 
         /// <summary>
         /// Entry Table offset.
@@ -266,7 +275,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint EntryTableOffset { get; set; }
+        public uint EntryTableOffset;
 
         /// <summary>
         /// Module Format Directives Table offset.
@@ -274,7 +283,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint ModuleDirectivesTableOffset { get; set; }
+        public uint ModuleDirectivesTableOffset;
 
         /// <summary>
         /// Number of Module Format Directives in the Table.
@@ -283,7 +292,7 @@
         /// This field specifies the number of entries in the
         /// Module Format Directives Table.
         /// </remarks>
-        public uint ModuleDirectivesCount { get; set; }
+        public uint ModuleDirectivesCount;
 
         /// <summary>
         /// Fixup Page Table offset.
@@ -291,7 +300,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint FixupPageTableOffset { get; set; }
+        public uint FixupPageTableOffset;
 
         /// <summary>
         /// Fixup Record Table offset.
@@ -299,7 +308,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint FixupRecordTableOffset { get; set; }
+        public uint FixupRecordTableOffset;
 
         /// <summary>
         /// Import Module Name Table offset.
@@ -307,12 +316,12 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint ImportedModulesNameTableOffset { get; set; }
+        public uint ImportedModulesNameTableOffset;
 
         /// <summary>
         /// The number of entries in the Import Module Name Table.
         /// </summary>
-        public uint ImportedModulesCount { get; set; }
+        public uint ImportedModulesCount;
 
         /// <summary>
         /// Import Procedure Name Table offset.
@@ -320,7 +329,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint ImportProcedureNameTableOffset { get; set; }
+        public uint ImportProcedureNameTableOffset;
 
         /// <summary>
         /// Per-page Checksum Table offset.
@@ -328,7 +337,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint PerPageChecksumTableOffset { get; set; }
+        public uint PerPageChecksumTableOffset;
 
         /// <summary>
         /// Data Pages Offset.
@@ -336,7 +345,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the EXE file.
         /// </remarks>
-        public uint DataPagesOffset { get; set; }
+        public uint DataPagesOffset;
 
         /// <summary>
         /// Number of Preload pages for this module.
@@ -345,7 +354,7 @@
         /// Note that OS/2 2.0 does not respect the preload of pages as specified
         /// in the executable file for performance reasons.
         /// </remarks>
-        public uint PreloadPageCount { get; set; }
+        public uint PreloadPageCount;
 
         /// <summary>
         /// Non-Resident Name Table offset.
@@ -353,12 +362,12 @@
         /// <remarks>
         /// This offset is relative to the beginning of the EXE file.
         /// </remarks>
-        public uint NonResidentNamesTableOffset { get; set; }
+        public uint NonResidentNamesTableOffset;
 
         /// <summary>
         /// Number of bytes in the Non-resident name table.
         /// </summary>
-        public uint NonResidentNamesTableLength { get; set; }
+        public uint NonResidentNamesTableLength;
 
         /// <summary>
         /// Non-Resident Name Table Checksum.
@@ -366,7 +375,7 @@
         /// <remarks>
         /// This is a cryptographic checksum of the Non-Resident Name Table.
         /// </remarks>
-        public uint NonResidentNamesTableChecksum { get; set; }
+        public uint NonResidentNamesTableChecksum;
 
         /// <summary>
         /// The Auto Data Segment Object number.
@@ -376,7 +385,7 @@
         /// This field is supported for 16-bit compatibility only and is not used by
         /// 32-bit modules.
         /// </remarks>
-        public uint AutomaticDataObject { get; set; }
+        public uint AutomaticDataObject;
 
         /// <summary>
         /// Debug Information offset.
@@ -384,7 +393,7 @@
         /// <remarks>
         /// This offset is relative to the beginning of the linear EXE header.
         /// </remarks>
-        public uint DebugInformationOffset { get; set; }
+        public uint DebugInformationOffset;
 
         /// <summary>
         /// Debug Information length.
@@ -392,7 +401,7 @@
         /// <remarks>
         /// The length of the debug information in bytes.
         /// </remarks>
-        public uint DebugInformationLength { get; set; }
+        public uint DebugInformationLength;
 
         /// <summary>
         /// Instance pages in preload section.
@@ -400,7 +409,7 @@
         /// <remarks>
         /// The number of instance data pages found in the preload section.
         /// </remarks>
-        public uint PreloadInstancePagesNumber { get; set; }
+        public uint PreloadInstancePagesNumber;
 
         /// <summary>
         /// Instance pages in demand section.
@@ -408,7 +417,7 @@
         /// <remarks>
         /// The number of instance data pages found in the demand section.
         /// </remarks>
-        public uint DemandInstancePagesNumber { get; set; }
+        public uint DemandInstancePagesNumber;
 
         /// <summary>
         /// Heap size added to the Auto DS Object.
@@ -418,6 +427,6 @@
         /// by the loader. This field is supported for 16-bit compatibility only and
         /// is not used by 32-bit modules.
         /// </remarks>
-        public uint ExtraHeapAllocation { get; set; }
+        public uint ExtraHeapAllocation;
     }
 }

LinearExecutable/ModuleFormatDirectivesTableEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.LinearExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.LinearExecutable
 {
     /// <summary>
     /// The Module Format Directives Table is an optional table that allows additional
@@ -13,6 +15,7 @@
     /// </summary>
     /// <see href="https://faydoc.tripod.com/formats/exe-LE.htm"/>
     /// <see href="http://www.edm2.com/index.php/LX_-_Linear_eXecutable_Module_Format_Description"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ModuleFormatDirectivesTableEntry
     {
         /// <summary>
@@ -22,7 +25,8 @@
         /// The directive number specifies the type of directive defined. This can be
         /// used to determine the format of the information in the directive data.
         /// </remarks>
-        public DirectiveNumber DirectiveNumber { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public DirectiveNumber DirectiveNumber;
 
         /// <summary>
         /// Directive data length.
@@ -30,7 +34,7 @@
         /// <remarks>
         /// This specifies the length in byte of the directive data for this directive number.
         /// </remarks>
-        public ushort DirectiveDataLength { get; set; }
+        public ushort DirectiveDataLength;
 
         /// <summary>
         /// Directive data offset.
@@ -40,6 +44,6 @@
         /// to beginning of linear EXE header for a resident table, and relative to the
         /// beginning of the EXE file for non-resident tables.
         /// </remarks>
-        public uint DirectiveDataOffset { get; set; }
+        public uint DirectiveDataOffset;
     }
 }

LinearExecutable/ObjectPageMapEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.LinearExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.LinearExecutable
 {
     /// <summary>
     /// The Object page table provides information about a logical page in an object.
@@ -13,6 +15,7 @@
     /// </summary>
     /// <see href="https://faydoc.tripod.com/formats/exe-LE.htm"/>
     /// <see href="http://www.edm2.com/index.php/LX_-_Linear_eXecutable_Module_Format_Description"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ObjectPageMapEntry
     {
         /// <summary>
@@ -35,7 +38,7 @@
         /// The logical page number (Object Page Table index), is used to index the Fixup
         /// Page Table to find any fixups associated with the logical page. 
         /// </remarks>
-        public uint PageDataOffset { get; set; }
+        public uint PageDataOffset;
 
         /// <summary>
         /// Number of bytes of data for this page.
@@ -47,11 +50,12 @@
         /// bytes are to be filled with zeros. If the FLAGS field indicates an Iterated Data
         /// Page, the iterated data records will completely fill out the remainder. 
         /// </remarks>
-        public ushort DataSize { get; set; }
+        public ushort DataSize;
 
         /// <summary>
         /// Attributes specifying characteristics of this logical page.
         /// </summary>
-        public ObjectPageFlags Flags { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public ObjectPageFlags Flags;
     }
 }

LinearExecutable/ObjectTableEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.LinearExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.LinearExecutable
 {
     /// <summary>
     /// The object table contains information that describes each segment in
@@ -12,6 +14,7 @@
     /// </remarks>
     /// <see href="https://faydoc.tripod.com/formats/exe-LE.htm"/>
     /// <see href="http://www.edm2.com/index.php/LX_-_Linear_eXecutable_Module_Format_Description"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ObjectTableEntry
     {
         /// <summary>
@@ -24,7 +27,7 @@
         /// file for the object. This memory size must also be large enough to
         /// contain all of the iterated data and uninitialized data in the EXE file. 
         /// </remarks>
-        public uint VirtualSegmentSize { get; set; }
+        public uint VirtualSegmentSize;
 
         /// <summary>
         /// Relocation Base Address.
@@ -34,12 +37,13 @@
         /// internal relocation fixups for the module have been removed, this is the
         /// address the object will be allocated at by the loader.
         /// </remarks>
-        public uint RelocationBaseAddress { get; set; }
+        public uint RelocationBaseAddress;
 
         /// <summary>
         /// Flag bits for the object.
         /// </summary>
-        public ObjectFlags ObjectFlags { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public ObjectFlags ObjectFlags;
 
         /// <summary>
         /// Object Page Table Index.
@@ -53,7 +57,7 @@
         /// other words the object table entries are sorted based on the object page table
         /// index value.
         /// </remarks>
-        public uint PageTableIndex { get; set; }
+        public uint PageTableIndex;
 
         /// <summary>
         /// # of object page table entries for this object.
@@ -69,11 +73,11 @@
         /// was neither a zero filled or invalid page, then the additional pages are treated
         /// as zero filled pages.
         /// </remarks>
-        public uint PageTableEntries { get; set; }
+        public uint PageTableEntries;
 
         /// <summary>
         /// Reserved for future use. Must be set to zero.
         /// </summary>
-        public uint Reserved { get; set; }
+        public uint Reserved;
     }
 }

LinearExecutable/PerPageChecksumTableEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.LinearExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.LinearExecutable
 {
     /// <summary>
     /// The Per-Page Checksum table provides space for a cryptographic checksum for
@@ -11,11 +13,12 @@
     /// </summary>
     /// <see href="https://faydoc.tripod.com/formats/exe-LE.htm"/>
     /// <see href="http://www.edm2.com/index.php/LX_-_Linear_eXecutable_Module_Format_Description"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class PerPageChecksumTableEntry
     {
         /// <summary>
         /// Cryptographic checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

LinearExecutable/ResourceTableEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.LinearExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.LinearExecutable
 {
     /// <summary>
     /// The resource table is an array of resource table entries. Each resource table
@@ -13,31 +15,33 @@
     /// </summary>
     /// <see href="https://faydoc.tripod.com/formats/exe-LE.htm"/>
     /// <see href="http://www.edm2.com/index.php/LX_-_Linear_eXecutable_Module_Format_Description"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ResourceTableEntry
     {
         /// <summary>
         /// Resource type ID.
         /// </summary>
-        public ResourceTableEntryType TypeID { get; set; }
+        [MarshalAs(UnmanagedType.U4)]
+        public ResourceTableEntryType TypeID;
 
         /// <summary>
         /// An ID used as a name for the resource when referred to.
         /// </summary>
-        public ushort NameID { get; set; }
+        public ushort NameID;
 
         /// <summary>
         /// The number of bytes the resource consists of.
         /// </summary>
-        public uint ResourceSize { get; set; }
+        public uint ResourceSize;
 
         /// <summary>
         /// The number of the object which contains the resource.
         /// </summary>
-        public ushort ObjectNumber { get; set; }
+        public ushort ObjectNumber;
 
         /// <summary>
         /// The offset within the specified object where the resource begins.
         /// </summary>
-        public uint Offset { get; set; }
+        public uint Offset;
     }
 }

LinearExecutable/VerifyRecordDirectiveTableEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.LinearExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.LinearExecutable
 {
     /// <summary>
     /// The Verify Record Directive Table is an optional table. It maintains a record
@@ -9,6 +11,7 @@
     /// </summary>
     /// <see href="https://faydoc.tripod.com/formats/exe-LE.htm"/>
     /// <see href="http://www.edm2.com/index.php/LX_-_Linear_eXecutable_Module_Format_Description"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class VerifyRecordDirectiveTableEntry
     {
         /// <summary>
@@ -19,7 +22,7 @@
         /// directive table. This is equal to the number of modules referenced by
         /// this module.
         /// </remarks>
-        public ushort EntryCount { get; set; }
+        public ushort EntryCount;
 
         /// <summary>
         /// Ordinal index into the Import Module Name Table.
@@ -28,7 +31,7 @@
         /// This value is an ordered index in to the Import Module Name Table for
         /// the referenced module.
         /// </remarks>
-        public ushort OrdinalIndex { get; set; }
+        public ushort OrdinalIndex;
 
         /// <summary>
         /// Module Version.
@@ -41,7 +44,7 @@
         /// number in a module to be incremented anytime the entry point offsets
         /// change.
         /// </remarks>
-        public ushort Version { get; set; }
+        public ushort Version;
 
         /// <summary>
         /// Module # of Object Entries.
@@ -50,7 +53,7 @@
         /// This field is used to identify the number of object verify entries
         /// that follow for the referenced module.
         /// </remarks>
-        public ushort ObjectEntriesCount { get; set; }
+        public ushort ObjectEntriesCount;
 
         /// <summary>
         /// Object # in Module.
@@ -59,7 +62,7 @@
         /// This field specifies the object number in the referenced module that
         /// is being verified.
         /// </remarks>
-        public ushort ObjectNumberInModule { get; set; }
+        public ushort ObjectNumberInModule;
 
         /// <summary>
         /// Object load base address.
@@ -68,7 +71,7 @@
         /// This is the address that the object was loaded at when the fixups were
         /// performed.
         /// </remarks>
-        public ushort ObjectLoadBaseAddress { get; set; }
+        public ushort ObjectLoadBaseAddress;
 
         /// <summary>
         /// Object virtual address size.
@@ -77,6 +80,6 @@
         /// This field specifies the total amount of virtual memory required for
         /// this object.
         /// </remarks>
-        public ushort ObjectVirtualAddressSize { get; set; }
+        public ushort ObjectVirtualAddressSize;
     }
 }

MSDOS/RelocationEntry.cs

@@ -1,19 +1,22 @@
-namespace SabreTools.Models.MSDOS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.MSDOS
 {
     /// <summary>
     /// Each pointer in the relocation table looks as such
     /// </summary>
     /// <see href="https://wiki.osdev.org/MZ"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class RelocationEntry
     {
         /// <summary>
         /// Offset of the relocation within provided segment.
         /// </summary>
-        public ushort Offset { get; set; }
+        public ushort Offset;
 
         /// <summary>
         /// Segment of the relocation, relative to the load segment address.
         /// </summary>
-        public ushort Segment { get; set; }
+        public ushort Segment;
     }
 }

MoPaQ/BlockEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.MoPaQ
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.MoPaQ
 {
     /// <summary>
     /// Block table contains informations about file sizes and way of their storage within
@@ -6,26 +8,28 @@
     /// of block table entry is (like hash table entry). The block table is also encrypted.
     /// </summary>
     /// <see href="http://zezula.net/en/mpq/mpqformat.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class BlockEntry
     {
         /// <summary>
         /// Offset of the beginning of the file data, relative to the beginning of the archive.
         /// </summary>
-        public uint FilePosition { get; set; }
+        public uint FilePosition;
 
         /// <summary>
         /// Compressed file size
         /// </summary>
-        public uint CompressedSize { get; set; }
+        public uint CompressedSize;
 
         /// <summary>
         /// Size of uncompressed file
         /// </summary>
-        public uint UncompressedSize { get; set; }
+        public uint UncompressedSize;
 
         /// <summary>
         /// Flags for the file.
         /// </summary>
-        public FileFlags Flags { get; set; }
+        [MarshalAs(UnmanagedType.U4)]
+        public FileFlags Flags;
     }
 }

MoPaQ/HashEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.MoPaQ
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.MoPaQ
 {
     /// <summary>
     /// Hash table is used for searching files by name. The file name is converted to
@@ -8,29 +10,31 @@
     /// table is 16 bytes.
     /// </summary>
     /// <see href="http://zezula.net/en/mpq/mpqformat.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class HashEntry
     {
         /// <summary>
         /// The hash of the full file name (part A)
         /// </summary>
-        public uint NameHashPartA { get; set; }
+        public uint NameHashPartA;
 
         /// <summary>
         /// The hash of the full file name (part B)
         /// </summary>
-        public uint NameHashPartB { get; set; }
+        public uint NameHashPartB;
 
         /// <summary>
         /// The language of the file. This is a Windows LANGID data type, and uses the same values.
         /// 0 indicates the default language (American English), or that the file is language-neutral.
         /// </summary>
-        public Locale Locale { get; set; }
+        [MarshalAs(UnmanagedType.I2)]
+        public Locale Locale;
 
         /// <summary>
         /// The platform the file is used for. 0 indicates the default platform.
         /// No other values have been observed.
         /// </summary>
-        public ushort Platform { get; set; }
+        public ushort Platform;
 
         /// <summary>
         /// If the hash table entry is valid, this is the index into the block table of the file.
@@ -40,6 +44,6 @@
         ///  - FFFFFFFEh: Hash table entry is empty, but was valid at some point (a deleted file).
         ///               Does not terminate searches for a given file.
         /// </summary>
-        public uint BlockIndex { get; set; }
+        public uint BlockIndex;
     }
 }

NCF/ChecksumEntry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ChecksumEntry
     {
         /// <summary>
         /// Checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

NCF/ChecksumHeader.cs

@@ -1,16 +1,19 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ChecksumHeader
     {
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Size of LPNCFCHECKSUMHEADER & LPNCFCHECKSUMMAPHEADER & in bytes.
         /// </summary>
-        public uint ChecksumSize { get; set; }
+        public uint ChecksumSize;
     }
 }

NCF/ChecksumMapEntry.cs

@@ -1,16 +1,19 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ChecksumMapEntry
     {
         /// <summary>
         /// Number of checksums.
         /// </summary>
-        public uint ChecksumCount { get; set; }
+        public uint ChecksumCount;
 
         /// <summary>
         /// Index of first checksum.
         /// </summary>
-        public uint FirstChecksumIndex { get; set; }
+        public uint FirstChecksumIndex;
     }
 }

NCF/ChecksumMapHeader.cs

@@ -1,26 +1,29 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ChecksumMapHeader
     {
         /// <summary>
         /// Always 0x14893721
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
 
         /// <summary>
         /// Number of items.
         /// </summary>
-        public uint ItemCount { get; set; }
+        public uint ItemCount;
 
         /// <summary>
         /// Number of checksums.
         /// </summary>
-        public uint ChecksumCount { get; set; }
+        public uint ChecksumCount;
     }
 }

NCF/DirectoryCopyEntry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryCopyEntry
     {
         /// <summary>
         /// Index of the directory item.
         /// </summary>
-        public uint DirectoryIndex { get; set; }
+        public uint DirectoryIndex;
     }
 }

NCF/DirectoryHeader.cs

@@ -1,76 +1,79 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryHeader
     {
         /// <summary>
         /// Always 0x00000004
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Cache ID.
         /// </summary>
-        public uint CacheID { get; set; }
+        public uint CacheID;
 
         /// <summary>
         /// NCF file version.
         /// </summary>
-        public uint LastVersionPlayed { get; set; }
+        public uint LastVersionPlayed;
 
         /// <summary>
         /// Number of items in the directory.
         /// </summary>
-        public uint ItemCount { get; set; }
+        public uint ItemCount;
 
         /// <summary>
         /// Number of files in the directory.
         /// </summary>
-        public uint FileCount { get; set; }
+        public uint FileCount;
 
         /// <summary>
         /// Always 0x00008000.  Data per checksum?
         /// </summary>
-        public uint ChecksumDataLength { get; set; }
+        public uint ChecksumDataLength;
 
         /// <summary>
         /// Size of lpNCFDirectoryEntries & lpNCFDirectoryNames & lpNCFDirectoryInfo1Entries & lpNCFDirectoryInfo2Entries & lpNCFDirectoryCopyEntries & lpNCFDirectoryLocalEntries in bytes.
         /// </summary>
-        public uint DirectorySize { get; set; }
+        public uint DirectorySize;
 
         /// <summary>
         /// Size of the directory names in bytes.
         /// </summary>
-        public uint NameSize { get; set; }
+        public uint NameSize;
 
         /// <summary>
         /// Number of Info1 entires.
         /// </summary>
-        public uint Info1Count { get; set; }
+        public uint Info1Count;
 
         /// <summary>
         /// Number of files to copy.
         /// </summary>
-        public uint CopyCount { get; set; }
+        public uint CopyCount;
 
         /// <summary>
         /// Number of files to keep local.
         /// </summary>
-        public uint LocalCount { get; set; }
+        public uint LocalCount;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy2 { get; set; }
+        public uint Dummy2;
 
         /// <summary>
         /// Header checksum.
         /// </summary>
-        public uint Checksum { get; set; }
+        public uint Checksum;
     }
 }

NCF/DirectoryInfo1Entry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryInfo1Entry
     {
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
     }
 }

NCF/DirectoryInfo2Entry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryInfo2Entry
     {
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
     }
 }

NCF/DirectoryLocalEntry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DirectoryLocalEntry
     {
         /// <summary>
         /// Index of the directory item.
         /// </summary>
-        public uint DirectoryIndex { get; set; }
+        public uint DirectoryIndex;
     }
 }

NCF/Header.cs

@@ -1,61 +1,64 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class Header
     {
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Always 0x00000002
         /// </summary>
-        public uint MajorVersion { get; set; }
+        public uint MajorVersion;
 
         /// <summary>
         /// NCF version number.
         /// </summary>
-        public uint MinorVersion { get; set; }
+        public uint MinorVersion;
 
         /// <summary>
         /// Cache ID
         /// </summary>
-        public uint CacheID { get; set; }
+        public uint CacheID;
 
         /// <summary>
         /// Last version played
         /// </summary>
-        public uint LastVersionPlayed { get; set; }
+        public uint LastVersionPlayed;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy2 { get; set; }
+        public uint Dummy2;
 
         /// <summary>
         /// Total size of NCF file in bytes.
         /// </summary>
-        public uint FileSize { get; set; }
+        public uint FileSize;
 
         /// <summary>
         /// Size of each data block in bytes.
         /// </summary>
-        public uint BlockSize { get; set; }
+        public uint BlockSize;
 
         /// <summary>
         /// Number of data blocks.
         /// </summary>
-        public uint BlockCount { get; set; }
+        public uint BlockCount;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy3 { get; set; }
+        public uint Dummy3;
     }
 }

NCF/UnknownEntry.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class UnknownEntry
     {
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
     }
 }

NCF/UnknownHeader.cs

@@ -1,16 +1,19 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NCF
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/NCFFile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class UnknownHeader
     {
         /// <summary>
         /// Always 0x00000001
         /// </summary>
-        public uint Dummy0 { get; set; }
+        public uint Dummy0;
 
         /// <summary>
         /// Always 0x00000000
         /// </summary>
-        public uint Dummy1 { get; set; }
+        public uint Dummy1;
     }
 }

NewExecutable/ExecutableHeader.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.NewExecutable
 {
     /// <summary>
@@ -6,6 +8,7 @@ namespace SabreTools.Models.NewExecutable
     /// </summary>
     /// <see href="http://bytepointer.com/resources/win16_ne_exe_format_win3.0.htm"/>
     /// <see href="https://github.com/libyal/libexe/blob/main/documentation/Executable%20(EXE)%20file%20format.asciidoc#24-ne-extended-header"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class ExecutableHeader
     {
         /// <summary>
@@ -13,38 +16,40 @@ namespace SabreTools.Models.NewExecutable
         /// "N" is low-order byte.
         /// "E" is high-order byte.
         /// </summary>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 2)]
         public string? Magic;
 
         /// <summary>
         /// Version number of the linker.
         /// </summary>
-        public byte LinkerVersion { get; set; }
+        public byte LinkerVersion;
         
         /// <summary>
         /// Revision number of the linker.
         /// </summary>
-        public byte LinkerRevision { get; set; }
+        public byte LinkerRevision;
         
         /// <summary>
         /// Entry Table file offset, relative to the beginning of the segmented EXE header.
         /// </summary>
-        public ushort EntryTableOffset { get; set; }
+        public ushort EntryTableOffset;
         
         /// <summary>
         /// Number of bytes in the entry table.
         /// </summary>
-        public ushort EntryTableSize { get; set; }
+        public ushort EntryTableSize;
 
         /// <summary>
         /// 32-bit CRC of entire contents of file.
         /// </summary>
         /// <remarks>These words are taken as 00 during the calculation.</remarks>
-        public uint CrcChecksum { get; set; }
+        public uint CrcChecksum;
 
         /// <summary>
         /// Flag word
         /// </summary>
-        public HeaderFlag FlagWord { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public HeaderFlag FlagWord;
 
         /// <summary>
         /// Segment number of automatic data segment.
@@ -57,26 +62,26 @@ namespace SabreTools.Models.NewExecutable
         /// table. The first entry in the segment table is segment
         /// number 1.
         /// </remarks>
-        public ushort AutomaticDataSegmentNumber { get; set; }
+        public ushort AutomaticDataSegmentNumber;
 
         /// <summary>
         /// Initial size, in bytes, of dynamic heap added to the
         /// data segment. This value is zero if no initial local
         /// heap is allocated.
         /// </summary>
-        public ushort InitialHeapAlloc { get; set; }
+        public ushort InitialHeapAlloc;
 
         /// <summary>
         /// Initial size, in bytes, of stack added to the data
         /// segment. This value is zero to indicate no initial
         /// stack allocation, or when SS is not equal to DS.
         /// </summary>
-        public ushort InitialStackAlloc { get; set; }
+        public ushort InitialStackAlloc;
 
         /// <summary>
         /// Segment number:offset of CS:IP.
         /// </summary>
-        public uint InitialCSIPSetting { get; set; }
+        public uint InitialCSIPSetting;
 
         /// <summary>
         /// Segment number:offset of SS:SP.
@@ -87,108 +92,110 @@ namespace SabreTools.Models.NewExecutable
         /// automatic data segment just below the additional heap
         /// area.
         /// </remarks>
-        public uint InitialSSSPSetting { get; set; }
+        public uint InitialSSSPSetting;
 
         /// <summary>
         /// Number of entries in the Segment Table.
         /// </summary>
-        public ushort FileSegmentCount { get; set; }
+        public ushort FileSegmentCount;
 
         /// <summary>
         /// Number of entries in the Module Reference Table.
         /// </summary>
-        public ushort ModuleReferenceTableSize { get; set; }
+        public ushort ModuleReferenceTableSize;
 
         /// <summary>
         /// Number of bytes in the Non-Resident Name Table.
         /// </summary>
-        public ushort NonResidentNameTableSize { get; set; }
+        public ushort NonResidentNameTableSize;
 
         /// <summary>
         /// Segment Table file offset, relative to the beginning
         /// of the segmented EXE header.
         /// </summary>
-        public ushort SegmentTableOffset { get; set; }
+        public ushort SegmentTableOffset;
 
         /// <summary>
         /// Resource Table file offset, relative to the beginning
         /// of the segmented EXE header.
         /// </summary>
-        public ushort ResourceTableOffset { get; set; }
+        public ushort ResourceTableOffset;
 
         /// <summary>
         /// Resident Name Table file offset, relative to the
         /// beginning of the segmented EXE header.
         /// </summary>
-        public ushort ResidentNameTableOffset { get; set; }
+        public ushort ResidentNameTableOffset;
 
         /// <summary>
         /// Module Reference Table file offset, relative to the
         /// beginning of the segmented EXE header.
         /// </summary>
-        public ushort ModuleReferenceTableOffset { get; set; }
+        public ushort ModuleReferenceTableOffset;
 
         /// <summary>
         /// Imported Names Table file offset, relative to the
         /// beginning of the segmented EXE header.
         /// </summary>
-        public ushort ImportedNamesTableOffset { get; set; }
+        public ushort ImportedNamesTableOffset;
 
         /// <summary>
         /// Non-Resident Name Table offset, relative to the
         /// beginning of the file.
         /// </summary>
-        public uint NonResidentNamesTableOffset { get; set; }
+        public uint NonResidentNamesTableOffset;
 
         /// <summary>
         /// Number of movable entries in the Entry Table.
         /// </summary>
-        public ushort MovableEntriesCount { get; set; }
+        public ushort MovableEntriesCount;
 
         /// <summary>
         /// Logical sector alignment shift count, log(base 2) of
         /// the segment sector size (default 9).
         /// </summary>
-        public ushort SegmentAlignmentShiftCount { get; set; }
+        public ushort SegmentAlignmentShiftCount;
 
         /// <summary>
         /// Number of resource entries.
         /// </summary>
-        public ushort ResourceEntriesCount { get; set; }
+        public ushort ResourceEntriesCount;
 
         /// <summary>
         /// Executable type, used by loader.
         /// </summary>
-        public OperatingSystem TargetOperatingSystem { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public OperatingSystem TargetOperatingSystem;
         
         /// <summary>
         /// Other OS/2 flags
         /// </summary>
-        public OS2Flag AdditionalFlags { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public OS2Flag AdditionalFlags;
         
         /// <summary>
         /// Offset to return thunks or start of gangload area
         /// </summary>
-        public ushort ReturnThunkOffset { get; set; }
+        public ushort ReturnThunkOffset;
         
         /// <summary>
         /// Offset to segment reference thunks or size of gangload area
         /// </summary>
-        public ushort SegmentReferenceThunkOffset { get; set; }
+        public ushort SegmentReferenceThunkOffset;
 
         /// <summary>
         /// Minimum code swap area size
         /// </summary>
-        public ushort MinCodeSwapAreaSize { get; set; }
+        public ushort MinCodeSwapAreaSize;
         
         /// <summary>
         /// Windows SDK revison number
         /// </summary>
-        public byte WindowsSDKRevision { get; set; }
+        public byte WindowsSDKRevision;
         
         /// <summary>
         /// Windows SDK version number
         /// </summary>
-        public byte WindowsSDKVersion { get; set; }
+        public byte WindowsSDKVersion;
     }
 }

NewExecutable/ImportNameRelocationRecord.cs

@@ -1,16 +1,19 @@
-namespace SabreTools.Models.NewExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.NewExecutable
 {
     /// <see href="http://bytepointer.com/resources/win16_ne_exe_format_win3.0.htm"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ImportNameRelocationRecord
     {
         /// <summary>
         /// Index into module reference table for the imported module.
         /// </summary>
-        public ushort Index { get; set; }
+        public ushort Index;
 
         /// <summary>
         /// Offset within Imported Names Table to procedure name string.
         /// </summary>
-        public ushort Offset { get; set; }
+        public ushort Offset;
     }
 }

NewExecutable/ImportOrdinalRelocationRecord.cs

@@ -1,16 +1,19 @@
-namespace SabreTools.Models.NewExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.NewExecutable
 {
     /// <see href="http://bytepointer.com/resources/win16_ne_exe_format_win3.0.htm"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ImportOrdinalRelocationRecord
     {
         /// <summary>
         /// Index into module reference table for the imported module.
         /// </summary>
-        public ushort Index { get; set; }
+        public ushort Index;
 
         /// <summary>
         /// Procedure ordinal number.
         /// </summary>
-        public ushort Ordinal { get; set; }
+        public ushort Ordinal;
     }
 }

NewExecutable/InternalRefRelocationRecord.cs

@@ -1,23 +1,26 @@
-namespace SabreTools.Models.NewExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.NewExecutable
 {
     /// <see href="http://bytepointer.com/resources/win16_ne_exe_format_win3.0.htm"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class InternalRefRelocationRecord
     {
         /// <summary>
         /// Segment number for a fixed segment, or 0FFh for a
         /// movable segment.
         /// </summary>
-        public byte SegmentNumber { get; set; }
+        public byte SegmentNumber;
 
         /// <summary>
         /// 0
         /// </summary>
-        public byte Reserved { get; set; }
+        public byte Reserved;
 
         /// <summary>
         /// Offset into segment if fixed segment, or ordinal
         /// number index into Entry Table if movable segment.
         /// </summary>
-        public ushort Offset { get; set; }
+        public ushort Offset;
     }
 }

NewExecutable/ModuleReferenceTableEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.NewExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.NewExecutable
 {
     /// <summary>
     /// The module-reference table follows the resident-name table. Each entry
@@ -6,11 +8,12 @@
     /// names table; each entry is 2 bytes long.
     /// </summary>
     /// <see href="http://bytepointer.com/resources/win16_ne_exe_format_win3.0.htm"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ModuleReferenceTableEntry
     {
         /// <summary>
         /// Offset within Imported Names Table to referenced module name string.
         /// </summary>
-        public ushort Offset { get; set; }
+        public ushort Offset;
     }
 }

NewExecutable/OSFixupRelocationRecord.cs

@@ -1,17 +1,21 @@
-namespace SabreTools.Models.NewExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.NewExecutable
 {
     /// <see href="http://bytepointer.com/resources/win16_ne_exe_format_win3.0.htm"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class OSFixupRelocationRecord
     {
         /// <summary>
         /// Operating system fixup type.
         /// Floating-point fixups.
         /// </summary>
-        public OSFixupType FixupType { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public OSFixupType FixupType;
 
         /// <summary>
         /// 0
         /// </summary>
-        public ushort Reserved { get; set; }
+        public ushort Reserved;
     }
 }

NewExecutable/ResourceTypeResourceEntry.cs

@@ -1,10 +1,13 @@
-namespace SabreTools.Models.NewExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.NewExecutable
 {
     /// <summary>
     /// A table of resources for this type follows. The following is
     /// the format of each resource (8 bytes each):
     /// </summary>
     /// <see href="http://bytepointer.com/resources/win16_ne_exe_format_win3.0.htm"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ResourceTypeResourceEntry
     {
         /// <summary>
@@ -13,17 +16,18 @@
         /// of the alignment shift count value specified at
         /// beginning of the resource table.
         /// </summary>
-        public ushort Offset { get; set; }
+        public ushort Offset;
 
         /// <summary>
         /// Length of the resource in the file (in bytes).
         /// </summary>
-        public ushort Length { get; set; }
+        public ushort Length;
 
         /// <summary>
         /// Flag word.
         /// </summary>
-        public ResourceTypeResourceFlag FlagWord { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public ResourceTypeResourceFlag FlagWord;
 
         /// <summary>
         /// Resource ID. This is an integer type if the high-order
@@ -31,11 +35,11 @@
         /// resource string, the offset is relative to the
         /// beginning of the resource table.
         /// </summary>
-        public ushort ResourceID { get; set; }
+        public ushort ResourceID;
 
         /// <summary>
         /// Reserved.
         /// </summary>
-        public uint Reserved { get; set; }
+        public uint Reserved;
     }
 }

NewExecutable/SegmentTableEntry.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.NewExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.NewExecutable
 {
     /// <summary>
     /// The segment table contains an entry for each segment in the executable
@@ -7,6 +9,7 @@
     /// The following is the structure of a segment table entry.
     /// </summary>
     /// <see href="http://bytepointer.com/resources/win16_ne_exe_format_win3.0.htm"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class SegmentTableEntry
     {
         /// <summary>
@@ -14,22 +17,23 @@
         /// data, relative to the beginning of the file. Zero means no
         /// file data.
         /// </summary>
-        public ushort Offset { get; set; }
+        public ushort Offset;
 
         /// <summary>
         /// Length of the segment in the file, in bytes. Zero means 64K.
         /// </summary>
-        public ushort Length { get; set; }
+        public ushort Length;
 
         /// <summary>
         /// Flag word.
         /// </summary>
-        public SegmentTableEntryFlag FlagWord { get; set; }
+        [MarshalAs(UnmanagedType.U2)]
+        public SegmentTableEntryFlag FlagWord;
 
         /// <summary>
         /// Minimum allocation size of the segment, in bytes. Total size
         /// of the segment. Zero means 64K.
         /// </summary>
-        public ushort MinimumAllocationSize { get; set; }
+        public ushort MinimumAllocationSize;
     }
 }

OfflineList/Infos.cs

@@ -27,6 +27,9 @@ namespace SabreTools.Models.OfflineList
         [XmlElement("releaseNumber")]
         public ReleaseNumber? ReleaseNumber { get; set; }
 
+        [XmlElement("imageNumber")]
+        public ImageNumber? ImageNumber { get; set; }
+
         [XmlElement("languageNumber")]
         public LanguageNumber? LanguageNumber { get; set; }
 

PAK/DirectoryItem.cs

@@ -1,21 +1,25 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.PAK
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/PAKFile.h"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class DirectoryItem
     {
         /// <summary>
         /// Item Name
         /// </summary>
-        public string? ItemName { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 56)]
+        public string? ItemName;
 
         /// <summary>
         /// Item Offset
         /// </summary>
-        public uint ItemOffset { get; set; }
+        public uint ItemOffset;
 
         /// <summary>
         /// Item Length
         /// </summary>
-        public uint ItemLength { get; set; }
+        public uint ItemLength;
     }
 }

PAK/Header.cs

@@ -1,21 +1,25 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.PAK
 {
     /// <see href="https://github.com/RavuAlHemio/hllib/blob/master/HLLib/PAKFile.h"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class Header
     {
         /// <summary>
         /// Signature
         /// </summary>
-        public string? Signature { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? Signature;
 
         /// <summary>
         /// Directory Offset
         /// </summary>
-        public uint DirectoryOffset { get; set; }
+        public uint DirectoryOffset;
 
         /// <summary>
         /// Directory Length
         /// </summary>
-        public uint DirectoryLength { get; set; }
+        public uint DirectoryLength;
     }
 }

PFF/Footer.cs

@@ -1,24 +1,28 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.PFF
 {
     /// <summary>
     /// PFF file footer
     /// </summary>
     /// <see href="https://devilsclaws.net/download/file-pff-new-bz2"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class Footer
     {
         /// <summary>
         /// Current system IP
         /// </summary>
-        public uint SystemIP { get; set; }
+        public uint SystemIP;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Reserved { get; set; }
+        public uint Reserved;
 
         /// <summary>
         /// King tag
         /// </summary>
-        public string? KingTag { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? KingTag;
     }
 }

PFF/Header.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.PFF
 {
     /// <summary>
@@ -5,32 +7,34 @@ namespace SabreTools.Models.PFF
     /// </summary>
     /// <remarks>Versions 2, 3, and 4 supported</remarks>
     /// <see href="https://devilsclaws.net/download/file-pff-new-bz2"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class Header
     {
         /// <summary>
         /// Size of the following header
         /// </summary>
-        public uint HeaderSize { get; set; }
+        public uint HeaderSize;
 
         /// <summary>
         /// Signature
         /// </summary>
         /// <remarks>Versions 2 and 3 share the same signature but different header sizes</remarks>
-        public string? Signature { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? Signature;
 
         /// <summary>
         /// Number of files
         /// </summary>
-        public uint NumberOfFiles { get; set; }
+        public uint NumberOfFiles;
 
         /// <summary>
         /// File segment size
         /// </summary>
-        public uint FileSegmentSize { get; set; }
+        public uint FileSegmentSize;
 
         /// <summary>
         /// File list offset
         /// </summary>
-        public uint FileListOffset { get; set; }
+        public uint FileListOffset;
     }
 }

PIC/DiscInformationUnitBody.cs

@@ -7,10 +7,6 @@ namespace SabreTools.Models.PIC
     {
         /// <summary>
         /// Disc Type Identifier
-        /// = "BDO" for BD-ROM
-        /// = "BDU" for BD-ROM Ultra
-        /// = "BDW" for BD-RE
-        /// = "BDR" for BD-R
         /// </summary>
         public string? DiscTypeIdentifier { get; set; }
 

PIC/DiscInformationUnitHeader.cs

@@ -1,43 +1,47 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.PIC
 {
     /// <see href="https://www.t10.org/ftp/t10/document.05/05-206r0.pdf"/>
     /// <see href="https://github.com/aaru-dps/Aaru.Decoders/blob/devel/Bluray/DI.cs"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public class DiscInformationUnitHeader
     {
         /// <summary>
         /// Disc Information Identifier "DI"
         /// Emergency Brake Identifier "EB"
         /// </summary>
-        public string? DiscInformationIdentifier { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 2)]
+        public string? DiscInformationIdentifier;
 
         /// <summary>
         /// Disc Information Format
         /// </summary>
-        public byte DiscInformationFormat { get; set; }
+        public byte DiscInformationFormat;
 
         /// <summary>
         /// Number of DI units in each DI block
         /// </summary>
-        public byte NumberOfUnitsInBlock { get; set; }
+        public byte NumberOfUnitsInBlock;
 
         /// <summary>
         /// Should be 0x00
         /// </summary>
-        public byte Reserved0 { get; set; }
+        public byte Reserved0;
 
         /// <summary>
         /// DI unit Sequence Number
         /// </summary>
-        public byte SequenceNumber { get; set; }
+        public byte SequenceNumber;
 
         /// <summary>
         /// Number of bytes in use in this DI unit
         /// </summary>
-        public byte BytesInUse { get; set; }
+        public byte BytesInUse;
 
         /// <summary>
         /// Should be 0x00
         /// </summary>
-        public byte Reserved1 { get; set; }
+        public byte Reserved1;
     }
 }

PIC/DiscInformationUnitTrailer.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.PIC
 {
     /// <summary>
@@ -5,28 +7,31 @@ namespace SabreTools.Models.PIC
     /// </summary>
     /// <see href="https://www.t10.org/ftp/t10/document.05/05-206r0.pdf"/>
     /// <see href="https://github.com/aaru-dps/Aaru.Decoders/blob/devel/Bluray/DI.cs"/>
+    [StructLayout(LayoutKind.Sequential)]
     public class DiscInformationUnitTrailer
     {
         /// <summary>
         /// Disc Manufacturer ID
         /// </summary>
         /// <remarks>6 bytes</remarks>
-        public byte[]? DiscManufacturerID { get; set; } = new byte[6];
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? DiscManufacturerID;
 
         /// <summary>
         /// Media Type ID
         /// </summary>
         /// <remarks>3 bytes</remarks>
-        public byte[]? MediaTypeID { get; set; } = new byte[3];
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+        public byte[]? MediaTypeID;
 
         /// <summary>
         /// Time Stamp
         /// </summary>
-        public ushort TimeStamp { get; set; }
+        public ushort TimeStamp;
 
         /// <summary>
         /// Product Revision Number
         /// </summary>
-        public byte ProductRevisionNumber { get; set; }
+        public byte ProductRevisionNumber;
     }
 }

PKZIP/Archive.cs

@@ -0,0 +1,72 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Represents a single ZIP/ZIP64 archive
+    /// </summary>
+    /// <remarks>PKZIP archives are meant to be read from the end</remarks>
+    public class Archive
+    {
+        #region Entries, Interleaved
+
+        /// <summary>
+        /// Local file headers, always appear first in each group
+        /// </summary>
+        public LocalFileHeader[]? LocalFileHeaders { get; set; }
+
+        /// <summary>
+        /// Encryption headers, may appear second in each group
+        /// </summary>
+        /// TODO: Determine the model for the encryption headers
+        public byte[]?[]? EncryptionHeaders { get; set; }
+
+        /// <summary>
+        /// File data, appears after the encryption header
+        /// if it exists or after the local file header otherwise
+        /// </summary>
+        public byte[][]? FileData { get; set; }
+
+        /// <summary>
+        /// Data descriptors, appears after the file data
+        /// </summary>
+        public DataDescriptor?[]? DataDescriptors { get; set; }
+
+        /// <summary>
+        /// ZIP64 Data descriptors, appears after the file data
+        /// </summary>
+        public DataDescriptor64?[]? ZIP64DataDescriptors { get; set; }
+
+        #endregion
+
+        /// <summary>
+        /// Optional archive decryption header, appears after all entries
+        /// </summary>
+        /// TODO: Determine the model
+        public byte[]? ArchiveDecryptionHeader { get; set; }
+
+        /// <summary>
+        /// Optional archive extra data record, appears after either
+        /// the archive decryption header or after all entries
+        /// </summary>
+        public ArchiveExtraDataRecord? ArchiveExtraDataRecord { get; set; }
+
+        /// <summary>
+        /// Central directory headers in sequential order
+        /// </summary>
+        public CentralDirectoryFileHeader[]? CentralDirectoryHeaders { get; set; }
+
+        /// <summary>
+        /// Optional ZIP64 end of central directory record
+        /// </summary>
+        public EndOfCentralDirectoryRecord64? ZIP64EndOfCentralDirectoryRecord { get; set; }
+
+        /// <summary>
+        /// Optional ZIP64 end of central directory locator
+        /// </summary>
+        public EndOfCentralDirectoryLocator64? ZIP64EndOfCentralDirectoryLocator { get; set; }
+
+        /// <summary>
+        /// Required end of central directory record, always must be last
+        /// </summary>
+        public EndOfCentralDirectoryRecord? EndOfCentralDirectoryRecord { get; set; }
+    }
+}

PKZIP/ArchiveExtraDataRecord.cs

@@ -0,0 +1,24 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Archive extra data record
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class ArchiveExtraDataRecord
+    {
+        /// <summary>
+        /// Archive extra data signature (0x08064B50)
+        /// </summary>
+        public uint Signature { get; set; }
+
+        /// <summary>
+        /// Extra field length
+        /// </summary>
+        public uint ExtraFieldLength { get; set; }
+
+        /// <summary>
+        /// Extra field data (variable size)
+        /// </summary>
+        public byte[]? ExtraFieldData { get; set; }
+    }
+}

PKZIP/CentralDirectoryFileHeader.cs

@@ -0,0 +1,119 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Central directory file header
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class CentralDirectoryFileHeader
+    {
+        /// <summary>
+        /// Central file header signature (0x02014B50)
+        /// </summary>
+        public uint Signature { get; set; }
+
+        /// <summary>
+        /// Host system on which the file attributes are compatible
+        /// </summary>
+        public HostSystem HostSystem { get; set; }
+
+        /// <summary>
+        /// ZIP specification version
+        /// </summary>
+        public byte VersionMadeBy { get; set; }
+
+        /// <summary>
+        /// Version needed to extract
+        /// </summary>
+        /// <remarks>TODO: Add mapping of versions</remarks>
+        public ushort VersionNeededToExtract { get; set; }
+
+        /// <summary>
+        /// General purpose bit flag
+        /// </summary>
+        public GeneralPurposeBitFlags Flags { get; set; }
+
+        /// <summary>
+        /// Compression method
+        /// </summary>
+        public CompressionMethod CompressionMethod { get; set; }
+
+        /// <summary>
+        /// Last modified file time
+        /// </summary>
+        public ushort LastModifedFileTime { get; set; }
+
+        /// <summary>
+        /// Last modified file date
+        /// </summary>
+        public ushort LastModifiedFileDate { get; set; }
+
+        /// <summary>
+        /// CRC-32
+        /// </summary>
+        public uint CRC32 { get; set; }
+
+        /// <summary>
+        /// Compressed size
+        /// </summary>
+        public uint CompressedSize { get; set; }
+
+        /// <summary>
+        /// Uncompressed size
+        /// </summary>
+        public uint UncompressedSize { get; set; }
+
+        /// <summary>
+        /// File name length
+        /// </summary>
+        public ushort FileNameLength { get; set; }
+
+        /// <summary>
+        /// Extra field length
+        /// </summary>
+        public ushort ExtraFieldLength { get; set; }
+
+        /// <summary>
+        /// File comment length
+        /// </summary>
+        public ushort FileCommentLength { get; set; }
+
+        /// <summary>
+        /// Disk number start
+        /// </summary>
+        public ushort DiskNumberStart { get; set; }
+
+        /// <summary>
+        /// Internal file attributes
+        /// </summary>
+        public InternalFileAttributes InternalFileAttributes { get; set; }
+
+        /// <summary>
+        /// External file attributes
+        /// </summary>
+        public uint ExternalFileAttributes { get; set; }
+
+        /// <summary>
+        /// Relative offset of local header
+        /// </summary>
+        /// <remarks>
+        /// If ZIP64 and value is 0xFFFFFFFF, size will be in the
+        /// extended information extra field
+        /// </remarks>
+        public uint RelativeOffsetOfLocalHeader { get; set; }
+
+        /// <summary>
+        /// File name (variable size)
+        /// </summary>
+        public string? FileName { get; set; }
+
+        /// <summary>
+        /// Extra field (variable size)
+        /// </summary>
+        public byte[]? ExtraField { get; set; }
+
+        /// <summary>
+        /// File comment (variable size)
+        /// </summary>
+        public string? FileComment { get; set; }
+    }
+}

PKZIP/Constants.cs

@@ -0,0 +1,85 @@
+namespace SabreTools.Models.PKZIP
+{
+    public static class Constants
+    {
+        #region Archive Extra Data Record
+
+        public const uint ArchiveExtraDataRecordSignature = 0x08064B50;
+
+        public static readonly byte[] ArchiveExtraDataRecordSignatureBytes = [0x50, 0x4B, 0x06, 0x08];
+
+        public static readonly string ArchiveExtraDataRecordSignatureString = "PK" + (char)0x06 + (char)0x08;
+
+        #endregion
+
+        #region Central Directory File Header
+
+        public const uint CentralDirectoryFileHeaderSignature = 0x02014B50;
+
+        public static readonly byte[] CentralDirectoryFileHeaderSignatureBytes = [0x50, 0x4B, 0x01, 0x02];
+
+        public static readonly string CentralDirectoryFileHeaderSignatureString = "PK" + (char)0x01 + (char)0x02;
+
+        #endregion
+
+        #region Data Descriptor
+
+        public const uint DataDescriptorSignature = 0x08074B50;
+
+        public static readonly byte[] DataDescriptorSignatureBytes = [0x50, 0x4B, 0x07, 0x08];
+
+        public static readonly string DataDescriptorSignatureString = "PK" + (char)0x07 + (char)0x08;
+
+        #endregion
+
+        #region Digital Signature
+
+        public const uint DigitalSignatureSignature = 0x05054B50;
+
+        public static readonly byte[] DigitalSignatureSignatureBytes = [0x50, 0x4B, 0x05, 0x05];
+
+        public static readonly string DigitalSignatureSignatureString = "PK" + (char)0x05 + (char)0x05;
+
+        #endregion
+
+        #region End of Central Directory Locator (ZIP64)
+
+        public const uint EndOfCentralDirectoryLocator64Signature = 0x07064B50;
+
+        public static readonly byte[] EndOfCentralDirectoryLocator64SignatureBytes = [0x50, 0x4B, 0x06, 0x07];
+
+        public static readonly string EndOfCentralDirectoryLocator64SignatureString = "PK" + (char)0x06 + (char)0x07;
+
+        #endregion
+
+        #region End of Central Directory Record
+
+        public const uint EndOfCentralDirectoryRecordSignature = 0x06054B50;
+
+        public static readonly byte[] EndOfCentralDirectoryRecordSignatureBytes = [0x50, 0x4B, 0x05, 0x06];
+
+        public static readonly string EndOfCentralDirectoryRecordSignatureString = "PK" + (char)0x05 + (char)0x06;
+
+        #endregion
+
+        #region End of Central Directory Record (ZIP64)
+
+        public const uint EndOfCentralDirectoryRecord64Signature = 0x06064B50;
+
+        public static readonly byte[] EndOfCentralDirectoryRecord64SignatureBytes = [0x50, 0x4B, 0x06, 0x06];
+
+        public static readonly string EndOfCentralDirectoryRecord64SignatureString = "PK" + (char)0x06 + (char)0x06;
+
+        #endregion
+
+        #region Local File Header
+
+        public const uint LocalFileHeaderSignature = 0x04034B50;
+
+        public static readonly byte[] LocalFileHeaderSignatureBytes = [0x50, 0x4B, 0x03, 0x04];
+
+        public static readonly string LocalFileHeaderSignatureString = "PK" + (char)0x03 + (char)0x04;
+
+        #endregion
+    }
+}

PKZIP/DataDescriptor.cs

@@ -0,0 +1,29 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Data descriptor
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class DataDescriptor
+    {
+        /// <summary>
+        /// Recommended, but optional, signature (0x08074B50)
+        /// </summary>
+        public uint? Signature { get; set; }
+
+        /// <summary>
+        /// CRC-32
+        /// </summary>
+        public uint CRC32 { get; set; }
+
+        /// <summary>
+        /// Compressed size
+        /// </summary>
+        public uint CompressedSize { get; set; }
+
+        /// <summary>
+        /// Uncompressed size
+        /// </summary>
+        public uint UncompressedSize { get; set; }
+    }
+}

PKZIP/DataDescriptor64.cs

@@ -0,0 +1,29 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Data descriptor (ZIP64)
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class DataDescriptor64
+    {
+        /// <summary>
+        /// Recommended, but optional, signature (0x08074B50)
+        /// </summary>
+        public uint? Signature { get; set; }
+
+        /// <summary>
+        /// CRC-32
+        /// </summary>
+        public uint CRC32 { get; set; }
+
+        /// <summary>
+        /// Compressed size
+        /// </summary>
+        public ulong CompressedSize { get; set; }
+
+        /// <summary>
+        /// Uncompressed size
+        /// </summary>
+        public ulong UncompressedSize { get; set; }
+    }
+}

PKZIP/DigitalSignature.cs

@@ -0,0 +1,24 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Digital signature
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class DigitalSignature
+    {
+        /// <summary>
+        /// Header signature (0x05054B50)
+        /// </summary>
+        public uint Signature { get; set; }
+
+        /// <summary>
+        /// Data length
+        /// </summary>
+        public ushort DataLength { get; set; }
+
+        /// <summary>
+        /// Signature data (variable size)
+        /// </summary>
+        public byte[]? SignatureData { get; set; }
+    }
+}

PKZIP/EndOfCentralDirectoryLocator64.cs

@@ -0,0 +1,32 @@
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Zip64 end of central directory locator
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    [StructLayout(LayoutKind.Sequential)]
+    public class EndOfCentralDirectoryLocator64
+    {
+        /// <summary>
+        /// ZIP64 end of central directory locator signature (0x07064B50)
+        /// </summary>
+        public uint Signature;
+
+        /// <summary>
+        /// Number of the disk with the start of the end of central directory
+        /// </summary>
+        public uint StartDiskNumber;
+
+        /// <summary>
+        /// Relative offset of start of central directory record
+        /// </summary>
+        public ulong CentralDirectoryOffset;
+
+        /// <summary>
+        /// Total number of disks
+        /// </summary>
+        public uint TotalDisks;
+    }
+}

PKZIP/EndOfCentralDirectoryRecord.cs

@@ -0,0 +1,79 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// End of central directory record
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class EndOfCentralDirectoryRecord
+    {
+        /// <summary>
+        /// End of central directory signature (0x06054B50)
+        /// </summary>
+        public uint Signature { get; set; }
+
+        /// <summary>
+        /// Number of this disk
+        /// </summary>
+        /// <remarks>
+        /// If ZIP64 and value is 0xFFFF, size will be in the
+        /// extended information extra field
+        /// </remarks>
+        public ushort DiskNumber { get; set; }
+
+        /// <summary>
+        /// Number of the disk with the start of the central directory
+        /// </summary>
+        /// <remarks>
+        /// If ZIP64 and value is 0xFFFF, size will be in the
+        /// extended information extra field
+        /// </remarks>
+        public ushort StartDiskNumber { get; set; }
+
+        /// <summary>
+        /// Total number of entries in the central directory on this disk
+        /// </summary>
+        /// <remarks>
+        /// If ZIP64 and value is 0xFFFF, size will be in the
+        /// extended information extra field
+        /// </remarks>
+        public ushort TotalEntriesOnDisk { get; set; }
+
+        /// <summary>
+        /// Total number of entries in the central directory
+        /// </summary>
+        /// <remarks>
+        /// If ZIP64 and value is 0xFFFF, size will be in the
+        /// extended information extra field
+        /// </remarks>
+        public ushort TotalEntries { get; set; }
+
+        /// <summary>
+        /// Size of the central directory
+        /// </summary>
+        /// <remarks>
+        /// If ZIP64 and value is 0xFFFFFFFF, size will be in the
+        /// extended information extra field
+        /// </remarks>
+        public uint CentralDirectorySize { get; set; }
+
+        /// <summary>
+        /// Offset of start of central directory with respect to the
+        /// starting disk number
+        /// </summary>
+        /// <remarks>
+        /// If ZIP64 and value is 0xFFFFFFFF, size will be in the
+        /// extended information extra field
+        /// </remarks>
+        public uint CentralDirectoryOffset { get; set; }
+
+        /// <summary>
+        /// .ZIP file comment length
+        /// </summary>
+        public ushort FileCommentLength { get; set; }
+
+        /// <summary>
+        /// .ZIP file comment
+        /// </summary>
+        public string? FileComment { get; set; }
+    }
+}

PKZIP/EndOfCentralDirectoryRecord64.cs

@@ -0,0 +1,72 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Zip64 end of central directory record
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class EndOfCentralDirectoryRecord64
+    {
+        /// <summary>
+        /// ZIP64 end of central directory signature (0x06064B50)
+        /// </summary>
+        public uint Signature { get; set; }
+
+        /// <summary>
+        /// Size of ZIP64 end of central directory record
+        /// </summary>
+        /// <remarks>SizeOfFixedFields + SizeOfVariableData - 12</remarks>
+        public ulong DirectoryRecordSize { get; set; }
+
+        /// <summary>
+        /// Host system on which the file attributes are compatible
+        /// </summary>
+        public HostSystem HostSystem { get; set; }
+
+        /// <summary>
+        /// ZIP specification version
+        /// </summary>
+        public byte VersionMadeBy { get; set; }
+
+        /// <summary>
+        /// Version needed to extract
+        /// </summary>
+        /// <remarks>TODO: Add mapping of versions</remarks>
+        public ushort VersionNeededToExtract { get; set; }
+
+        /// <summary>
+        /// Number of this disk
+        /// </summary>
+        public uint DiskNumber { get; set; }
+
+        /// <summary>
+        /// Number of the disk with the start of the central directory
+        /// </summary>
+        public uint StartDiskNumber { get; set; }
+
+        /// <summary>
+        /// Total number of entries in the central directory on this disk
+        /// </summary>
+        public ulong TotalEntriesOnDisk { get; set; }
+
+        /// <summary>
+        /// Total number of entries in the central directory
+        /// </summary>
+        public ulong TotalEntries { get; set; }
+
+        /// <summary>
+        /// Size of the central directory
+        /// </summary>
+        public ulong CentralDirectorySize { get; set; }
+
+        /// <summary>
+        /// Offset of start of central directory with respect to the
+        /// starting disk number
+        /// </summary>
+        public ulong CentralDirectoryOffset { get; set; }
+
+        /// <summary>
+        /// ZIP64 extensible data sector
+        /// </summary>
+        public byte[]? ExtensibleDataSector { get; set; }
+    }
+}

PKZIP/Enums.cs

@@ -0,0 +1,719 @@
+using System;
+
+/// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+namespace SabreTools.Models.PKZIP
+{
+    public enum CompressionMethod : ushort
+    {
+        /// <summary>
+        /// The file is stored (no compression)
+        /// </summary>
+        Stored = 0,
+
+        /// <summary>
+        /// The file is Shrunk
+        /// </summary>
+        Shrunk = 1,
+
+        /// <summary>
+        /// The file is Reduced with compression factor 1
+        /// </summary>
+        ReducedCompressionFactor1 = 2,
+
+        /// <summary>
+        /// The file is Reduced with compression factor 2
+        /// </summary>
+        ReducedCompressionFactor2 = 3,
+
+        /// <summary>
+        /// The file is Reduced with compression factor 3
+        /// </summary>
+        ReducedCompressionFactor3 = 4,
+
+        /// <summary>
+        /// The file is Reduced with compression factor 4
+        /// </summary>
+        ReducedCompressionFactor4 = 5,
+
+        /// <summary>
+        /// The file is Imploded
+        /// </summary>
+        Implode = 6,
+
+        /// <summary>
+        /// Reserved for Tokenizing compression algorithm
+        /// </summary>
+        TokenizingCompressionAlgorithm = 7,
+
+        /// <summary>
+        /// The file is Deflated
+        /// </summary>
+        Deflate = 8,
+
+        /// <summary>
+        /// Enhanced Deflating using Deflate64(tm)
+        /// </summary>
+        Deflate64 = 9,
+
+        /// <summary>
+        /// PKWARE Data Compression Library Imploding (old IBM TERSE)
+        /// </summary>
+        PKWAREDataCompressionLibraryImplode = 10,
+
+        /// <summary>
+        /// Reserved by PKWARE
+        /// </summary>
+        CompressionMethod11 = 11,
+
+        /// <summary>
+        /// File is compressed using BZIP2 algorithm
+        /// </summary>
+        BZIP2 = 12,
+
+        /// <summary>
+        /// Reserved by PKWARE
+        /// </summary>
+        CompressionMethod13 = 13,
+
+        /// <summary>
+        /// LZMA
+        /// </summary>
+        LZMA = 14,
+
+        /// <summary>
+        /// Reserved by PKWARE
+        /// </summary>
+        CompressionMethod15 = 15,
+
+        /// <summary>
+        /// IBM z/OS CMPSC Compression
+        /// </summary>
+        IBMzOSCMPSC = 16,
+
+        /// <summary>
+        /// Reserved by PKWARE
+        /// </summary>
+        CompressionMethod17 = 17,
+
+        /// <summary>
+        /// File is compressed using IBM TERSE (new)
+        /// </summary>
+        IBMTERSE = 18,
+
+        /// <summary>
+        /// IBM LZ77 z Architecture
+        /// </summary>
+        IBMLZ77 = 19,
+
+        /// <summary>
+        /// deprecated (use method 93 for zstd)
+        /// </summary>
+        [Obsolete]
+        OldZstandard = 20,
+
+        /// <summary>
+        /// Zstandard (zstd) Compression
+        /// </summary>
+        Zstandard = 93,
+
+        /// <summary>
+        /// MP3 Compression
+        /// </summary>
+        MP3 = 94,
+
+        /// <summary>
+        /// XZ Compression
+        /// </summary>
+        XZ = 95,
+
+        /// <summary>
+        /// JPEG variant
+        /// </summary>
+        JPEGVariant = 96,
+
+        /// <summary>
+        /// WavPack compressed data
+        /// </summary>
+        WavPack = 97,
+
+        /// <summary>
+        /// PPMd version I, Rev 1
+        /// </summary>
+        PPMdVersionIRev1 = 98,
+
+        /// <summary>
+        /// AE-x encryption marker
+        /// </summary>
+        AExEncryption = 99,
+    }
+
+    [Flags]
+    public enum GeneralPurposeBitFlags : ushort
+    {
+        /// <summary>
+        /// Indicates that the file is encrypted
+        /// </summary>
+        FileEncrypted = 0b0000_0000_0000_0001,
+
+        #region Compression Method 6 (Implode)
+
+        /// <summary>
+        /// Set   - 8K sliding dictionary
+        /// Clear - 4K sliding dictionary
+        /// </summary>
+        LargeSlidingDictionary = 0b0000_0000_0000_0010,
+
+        /// <summary>
+        /// Set   - 3 Shannon-Fano trees were used
+        /// Clear - 2 Shannon-Fano trees were used
+        /// </summary>
+        ThreeTrees = 0b0000_0000_0000_0100,
+
+        #endregion
+
+        #region Compression Method 8 (Deflate)
+
+        /// <summary>
+        /// Normal (-en) compression
+        /// </summary>
+        NormalCompression = 0b0000_0000_0000_0000,
+
+        /// <summary>
+        /// Maximum (-ex) compression
+        /// </summary>
+        MaximumCompression = 0b0000_0000_0000_0010,
+
+        /// <summary>
+        /// Fast (-ef) compression
+        /// </summary>
+        FastCompression = 0b0000_0000_0000_0100,
+
+        /// <summary>
+        /// Super Fast (-es) compression
+        /// </summary>
+        SuperFastCompression = 0b0000_0000_0000_0110,
+
+        #endregion
+
+        #region Compression Method 14 (LZMA)
+
+        /// <summary>
+        /// Set   - indicates an end-of-stream (EOS) marker is used to
+        ///         mark the end of the compressed data stream.
+        /// Clear - an EOS marker is not present and the compressed data
+        ///         size must be known to extract.
+        /// </summary>
+        EndOfStreamMarker = 0b0000_0000_0000_0010,
+
+        #endregion
+
+        /// <summary>
+        /// set - the fields crc-32, compressed size and
+        ///       uncompressed size are set to zero in the
+        ///       local header. The correct values are put
+        ///       in the data descriptor immediately
+        ///       following the compressed data.
+        /// </summary>
+        NoCRC = 0b0000_0000_0000_1000,
+
+        /// <summary>
+        /// Reserved for use with method 8, for enhanced deflating. 
+        /// </summary>
+        EnhancedDeflateReserved = 0b0000_0000_0001_0000,
+
+        /// <summary>
+        /// Indicates that the file is compressed patched data.
+        /// </summary>
+        /// <remarks>Requires PKZIP version 2.70 or greater</remarks>
+        CompressedPatchedData = 0b0000_0000_0010_0000,
+
+        /// <summary>
+        /// Set   - you MUST set the version needed to extract value
+        ///         to at least 50 and you MUST also set bit 0. If AES
+        ///         encryption is used, the version needed to extract
+        ///         value MUST be at least 51.
+        /// </summary>
+        StrongEncryption = 0b0000_0000_0100_0000,
+
+        /// <summary>
+        /// Currently unused
+        /// </summary>
+        Bit7 = 0b0000_0000_1000_0000,
+
+        /// <summary>
+        /// Currently unused
+        /// </summary>
+        Bit8 = 0b0000_0001_0000_0000,
+
+        /// <summary>
+        /// Currently unused
+        /// </summary>
+        Bit9 = 0b0000_0010_0000_0000,
+
+        /// <summary>
+        /// Currently unused
+        /// </summary>
+        Bit10 = 0b0000_0100_0000_0000,
+
+        /// <summary>
+        /// Set   - the filename and comment fields for this
+        ///         file MUST be encoded using UTF-8.
+        /// </summary>
+        LanguageEncodingFlag = 0b0000_1000_0000_0000,
+
+        /// <summary>
+        /// Reserved by PKWARE for enhanced compression
+        /// </summary>
+        PKWAREEnhancedCompression = 0b0001_0000_0000_0000,
+
+        /// <summary>
+        /// Set   - Set when encrypting the Central Directory to
+        ///         indicate selected data values in the Local
+        ///         Header are masked to hide their actual values
+        /// </summary>
+        LocalHeaderValuesMasked = 0b0010_0000_0000_0000,
+
+        /// <summary>
+        /// Reserved by PKWARE for alternate streams
+        /// </summary>
+        PKWAREAlternateStreams = 0b0100_0000_0000_0000,
+
+        /// <summary>
+        /// Reserved by PKWARE
+        /// </summary>
+        PKWAREReserved = 0b1000_0000_0000_0000,
+    }
+
+    public enum HeaderID : ushort
+    {
+        /// <summary>
+        /// Zip64 extended information extra field
+        /// </summary>
+        Zip64ExtendedInformation = 0x0001,
+
+        /// <summary>
+        /// AV Info
+        /// </summary>
+        AVInfo = 0x0007,
+
+        /// <summary>
+        /// Reserved for extended language encoding data (PFS)
+        /// </summary>
+        ExtendedLanguageEncodingData = 0x0008,
+
+        /// <summary>
+        /// OS/2
+        /// </summary>
+        OS2 = 0x0009,
+
+        /// <summary>
+        /// NTFS
+        /// </summary>
+        NTFS = 0x000A,
+
+        /// <summary>
+        /// OpenVMS
+        /// </summary>
+        OpenVMS = 0x000C,
+
+        /// <summary>
+        /// UNIX
+        /// </summary>
+        UNIX = 0x000D,
+
+        /// <summary>
+        /// Reserved for file stream and fork descriptors
+        /// </summary>
+        FileStreamFork = 0x000E,
+
+        /// <summary>
+        /// Patch Descriptor
+        /// </summary>
+        PatchDescriptor = 0x000F,
+
+        /// <summary>
+        /// PKCS#7 Store for X.509 Certificates
+        /// </summary>
+        PKCSStore = 0x0014,
+
+        /// <summary>
+        /// X.509 Certificate ID and Signature for individual file
+        /// </summary>
+        X509IndividualFile = 0x0015,
+
+        /// <summary>
+        /// X.509 Certificate ID for Central Directory
+        /// </summary>
+        X509CentralDirectory = 0x0016,
+
+        /// <summary>
+        /// Strong Encryption Header
+        /// </summary>
+        StrongEncryptionHeader = 0x0017,
+
+        /// <summary>
+        /// Record Management Controls
+        /// </summary>
+        RecordManagementControls = 0x0018,
+
+        /// <summary>
+        /// PKCS#7 Encryption Recipient Certificate List
+        /// </summary>
+        PKCSCertificateList = 0x0019,
+
+        /// <summary>
+        /// Reserved for Timestamp record
+        /// </summary>
+        Timestamp = 0x0020,
+
+        /// <summary>
+        /// Policy Decryption Key Record
+        /// </summary>
+        PolicyDecryptionKey = 0x0021,
+
+        /// <summary>
+        /// Smartcrypt Key Provider Record
+        /// </summary>
+        SmartcryptKeyProvider = 0x0022,
+
+        /// <summary>
+        /// Smartcrypt Policy Key Data Record
+        /// </summary>
+        SmartcryptPolicyKeyData = 0x0023,
+
+        /// <summary>
+        /// IBM S/390 (Z390), AS/400 (I400) attributes - uncompressed
+        /// </summary>
+        IBMS390AttributesUncompressed = 0x0065,
+
+        /// <summary>
+        /// Reserved for IBM S/390 (Z390), AS/400 (I400) attributes - compressed
+        /// </summary>
+        IBMS390AttributesCompressed = 0x0066,
+
+        /// <summary>
+        /// POSZIP 4690 (reserved)
+        /// </summary>
+        POSZIP4690 = 0x4690,
+
+        #region Third-Party
+
+        /// <summary>
+        /// Macintosh
+        /// </summary>
+        Macintosh = 0x07C8,
+
+        /// <summary>
+        /// Pixar USD header ID
+        /// </summary>
+        PixarUSD = 0x1986,
+
+        /// <summary>
+        /// ZipIt Macintosh
+        /// </summary>
+        ZipItMacintosh = 0x2605,
+
+        /// <summary>
+        /// ZipIt Macintosh 1.3.5+
+        /// </summary>
+        ZipItMacintosh135Plus = 0x2705,
+
+        /// <summary>
+        /// ZipIt Macintosh 1.3.5+
+        /// </summary>
+        ZipItMacintosh135PlusAlt = 0x2805,
+
+        /// <summary>
+        /// Info-ZIP Macintosh
+        /// </summary>
+        InfoZIPMacintosh = 0x334D,
+
+        /// <summary>
+        /// Acorn/SparkFS
+        /// </summary>
+        AcornSparkFS = 0x4341,
+
+        /// <summary>
+        /// Windows NT security descriptor (binary ACL)
+        /// </summary>
+        WindowsNTSecurityDescriptor = 0x4453,
+
+        /// <summary>
+        /// VM/CMS
+        /// </summary>
+        VMCMS = 0x4704,
+
+        /// <summary>
+        /// MVS
+        /// </summary>
+        MVS = 0x470F,
+
+        /// <summary>
+        /// THEOS (old?)
+        /// </summary>
+        THEOSold = 0x4854,
+
+        /// <summary>
+        /// FWKCS MD5
+        /// </summary>
+        FWKCSMD5 = 0x4B46,
+
+        /// <summary>
+        /// OS/2 access control list (text ACL)
+        /// </summary>
+        OS2AccessControlList = 0x4C41,
+
+        /// <summary>
+        /// Info-ZIP OpenVMS
+        /// </summary>
+        InfoZIPOpenVMS = 0x4D49,
+
+        /// <summary>
+        /// Macintosh Smartzip (??)
+        /// </summary>
+        MacintoshSmartzip = 0x4D63,
+
+        /// <summary>
+        /// Xceed original location extra field
+        /// </summary>
+        XceedOriginalLocation = 0x4F4C,
+
+        /// <summary>
+        /// AOS/VS (ACL)
+        /// </summary>
+        ADSVS = 0x5356,
+
+        /// <summary>
+        /// extended timestamp
+        /// </summary>
+        ExtendedTimestamp = 0x5455,
+
+        /// <summary>
+        /// Xceed unicode extra field
+        /// </summary>
+        XceedUnicode = 0x554E,
+
+        /// <summary>
+        /// Info-ZIP UNIX (original, also OS/2, NT, etc)
+        /// </summary>
+        InfoZIPUNIX = 0x5855,
+
+        /// <summary>
+        /// Info-ZIP Unicode Comment Extra Field
+        /// </summary>
+        InfoZIPUnicodeComment = 0x6375,
+
+        /// <summary>
+        /// BeOS/BeBox
+        /// </summary>
+        BeOSBeBox = 0x6542,
+
+        /// <summary>
+        /// THEOS
+        /// </summary>
+        THEOS = 0x6854,
+
+        /// <summary>
+        /// Info-ZIP Unicode Path Extra Field
+        /// </summary>
+        InfoZIPUnicodePath = 0x7075,
+
+        /// <summary>
+        /// AtheOS/Syllable
+        /// </summary>
+        AtheOSSyllable = 0x7441,
+
+        /// <summary>
+        /// ASi UNIX
+        /// </summary>
+        ASiUNIX = 0x756E,
+
+        /// <summary>
+        /// Info-ZIP UNIX (new)
+        /// </summary>
+        InfoZIPUNIXNew = 0x7855,
+
+        /// <summary>
+        /// Info-ZIP UNIX (newer UID/GID)
+        /// </summary>
+        InfoZIPUNIXNewer = 0x7875,
+
+        /// <summary>
+        /// Data Stream Alignment (Apache Commons-Compress)
+        /// </summary>
+        DataStreamAlignment = 0xA11E,
+
+        /// <summary>
+        /// Microsoft Open Packaging Growth Hint
+        /// </summary>
+        MicrosoftOpenPackagingGrowthHint = 0xA220,
+
+        /// <summary>
+        /// Java JAR file Extra Field Header ID
+        /// </summary>
+        JavaJAR = 0xCAFE,
+
+        /// <summary>
+        /// Android ZIP Alignment Extra Field
+        /// </summary>
+        AndroidZIPAlignment = 0xD935,
+
+        /// <summary>
+        /// Korean ZIP code page info
+        /// </summary>
+        KoreanZIPCodePage = 0xE57A,
+
+        /// <summary>
+        /// SMS/QDOS
+        /// </summary>
+        SMSQDOS = 0xFD4A,
+
+        /// <summary>
+        /// AE-x encryption structure
+        /// </summary>
+        AExEncryptionStructure = 0x9901,
+
+        /// <summary>
+        /// Unknown
+        /// </summary>
+        Unknown = 0x9902,
+
+        #endregion
+    }
+
+    public enum HostSystem : byte
+    {
+        /// <summary>
+        /// MS-DOS and OS/2 (FAT / VFAT / FAT32 file systems)
+        /// </summary>
+        MSDOS = 0,
+
+        /// <summary>
+        /// Amiga
+        /// </summary>
+        Amiga = 1,
+
+        /// <summary>
+        /// OpenVMS
+        /// </summary>
+        OpenVMS = 2,
+
+        /// <summary>
+        /// UNIX
+        /// </summary>
+        UNIX = 3,
+
+        /// <summary>
+        /// VM/CMS
+        /// </summary>
+        VMCMS = 4,
+
+        /// <summary>
+        /// Atari ST
+        /// </summary>
+        AtariST = 5,
+
+        /// <summary>
+        /// OS/2 H.P.F.S.
+        /// </summary>
+        OS2HPFS = 6,
+
+        /// <summary>
+        /// Macintosh
+        /// </summary>
+        Macintosh = 7,
+
+        /// <summary>
+        /// Z-System
+        /// </summary>
+        ZSystem = 8,
+
+        /// <summary>
+        /// CP/M
+        /// </summary>
+        CPM = 9,
+
+        /// <summary>
+        /// Windows NTFS
+        /// </summary>
+        WindowsNTFS = 10,
+
+        /// <summary>
+        /// MVS (OS/390 - Z/OS)
+        /// </summary>
+        MVS = 11,
+
+        /// <summary>
+        /// VSE
+        /// </summary>
+        VSE = 12,
+
+        /// <summary>
+        /// Acorn Risc
+        /// </summary>
+        AcornRisc = 13,
+
+        /// <summary>
+        /// VFAT
+        /// </summary>
+        VFAT = 14,
+
+        /// <summary>
+        /// alternate MVS
+        /// </summary>
+        AlternateVMS = 15,
+
+        /// <summary>
+        /// BeOS
+        /// </summary>
+        BeOS = 16,
+
+        /// <summary>
+        /// Tandem
+        /// </summary>
+        Tandem = 17,
+
+        /// <summary>
+        /// OS/400
+        /// </summary>
+        OS400 = 18,
+
+        /// <summary>
+        /// OS X (Darwin)
+        /// </summary>
+        OSX = 19,
+
+        // 20 thru 255 - unused
+    }
+
+    [Flags]
+    public enum InternalFileAttributes : ushort
+    {
+        /// <summary>
+        /// Set   - The file is apparently an ASCII or text file
+        /// Clear - The file is apparently binary data
+        /// </summary>
+        ASCII = 0b0000_0000_0000_0001,
+
+        /// <summary>
+        /// Reserved for use by PKWARE
+        /// </summary>
+        Bit1 = 0b0000_0000_0000_0010,
+
+        /// <summary>
+        /// Reserved for use by PKWARE
+        /// </summary>
+        Bit2 = 0b0000_0000_0000_0100,
+
+        /*
+         4.4.14.2 The 0x0002 bit of this field indicates, if set, that 
+         a 4 byte variable record length control field precedes each 
+         logical record indicating the length of the record. The 
+         record length control field is stored in little-endian byte
+         order.  This flag is independent of text control characters, 
+         and if used in conjunction with text data, includes any 
+         control characters in the total length of the record. This 
+         value is provided for mainframe data transfer support.
+        */
+    }
+}

PKZIP/LocalFileHeader.cs

@@ -0,0 +1,77 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// PKZIP local file header
+    /// </summary>
+    /// <see href="https://petlibrary.tripod.com/ZIP.HTM"/> 
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class LocalFileHeader
+    {
+        /// <summary>
+        /// Signature (0x04034B50)
+        /// </summary>
+        public uint Signature { get; set; }
+
+        /// <summary>
+        /// Version needed to extract
+        /// decimal value/10 = major version #
+        /// decimal value%10 = minor version #
+        /// </summary>
+        public ushort Version { get; set; }
+
+        /// <summary>
+        /// General purpose bit flag
+        /// </summary>
+        public GeneralPurposeBitFlags Flags { get; set; }
+
+        /// <summary>
+        /// Compression method
+        /// </summary>
+        public CompressionMethod CompressionMethod { get; set; }
+
+        /// <summary>
+        /// Last modified file time
+        /// </summary>
+        public ushort LastModifedFileTime { get; set; }
+
+        /// <summary>
+        /// Last modified file date
+        /// </summary>
+        public ushort LastModifiedFileDate { get; set; }
+
+        /// <summary>
+        /// CRC-32
+        /// </summary>
+        public uint CRC32 { get; set; }
+
+        /// <summary>
+        /// Compressed size
+        /// </summary>
+        public uint CompressedSize { get; set; }
+
+        /// <summary>
+        /// Uncompressed size
+        /// </summary>
+        public uint UncompressedSize { get; set; }
+
+        /// <summary>
+        /// File name length
+        /// </summary>
+        public ushort FileNameLength { get; set; }
+
+        /// <summary>
+        /// Extra field length
+        /// </summary>
+        public ushort ExtraFieldLength { get; set; }
+
+        /// <summary>
+        /// File name (variable size)
+        /// </summary>
+        public string? FileName { get; set; }
+
+        /// <summary>
+        /// Extra field (variable size)
+        /// </summary>
+        public byte[]? ExtraField { get; set; }
+    }
+}

PKZIP/SpecialPurposeDataHeader.cs

@@ -0,0 +1,25 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Special purpose data for ZIP64 extensible data field
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class SpecialPurposeDataHeader
+    {
+        /// <summary>
+        /// Header ID (data type)
+        /// </summary>
+        public HeaderID HeaderID { get; set; }
+
+        /// <summary>
+        /// Data size
+        /// </summary>
+        public uint DataSize { get; set; }
+
+        /// <summary>
+        /// Data (variable size)
+        /// </summary>
+        /// TODO: Implement models for all extra field types - 4.5.3
+        public byte[]? Data { get; set; }
+    }
+}