Bump version

BDPlus/SVM.cs

@@ -6,11 +6,13 @@ namespace SabreTools.Models.BDPlus
         /// <summary>
         /// "BDSVM_CC"
         /// </summary>
+        /// <remarks>8 bytes</remarks>
         public string? Signature { get; set; }
 
         /// <summary>
-        /// 5 bytes of unknown data
+        /// Unknown data
         /// </summary>
+        /// <remarks>5 bytes</remarks>
         public byte[]? Unknown1 { get; set; }
 
         /// <summary>
@@ -29,8 +31,9 @@ namespace SabreTools.Models.BDPlus
         public byte Day { get; set; }
 
         /// <summary>
-        /// 4 bytes of unknown data
+        /// Unknown data
         /// </summary>
+        /// <remarks>4 bytes</remarks>
         public byte[]? Unknown2 { get; set; }
 
         /// <summary>

BFPK/Archive.cs

@@ -14,6 +14,6 @@
         /// <summary>
         /// Files
         /// </summary>
-        public FileEntry?[]? Files { get; set; }
+        public FileEntry[]? Files { get; set; }
     }
 }

BSP/TextureHeader.cs

@@ -11,6 +11,7 @@ namespace SabreTools.Models.BSP
         /// <summary>
         /// Offsets
         /// </summary>
+        /// <remarks>TextureCount entries</remarks>
         public uint[]? Offsets { get; set; }
     }
 }

CFB/Binary.cs

@@ -25,7 +25,7 @@ namespace SabreTools.Models.CFB
         /// 
         /// If Header Major Version is 4, there MUST be 1,024 fields specified to fill a 4,096-byte sector
         /// </remarks>
-        public SectorNumber?[]? FATSectorNumbers { get; set; }
+        public SectorNumber[]? FATSectorNumbers { get; set; }
 
         /// <summary>
         /// The mini FAT is used to allocate space in the mini stream.
@@ -38,7 +38,7 @@ namespace SabreTools.Models.CFB
         /// 
         /// If Header Major Version is 4, there MUST be 1,024 fields specified to fill a 4,096-byte sector
         /// </remarks>
-        public SectorNumber?[]? MiniFATSectorNumbers { get; set; }
+        public SectorNumber[]? MiniFATSectorNumbers { get; set; }
 
         /// <summary>
         /// The DIFAT array is used to represent storage of the FAT sectors.
@@ -55,7 +55,7 @@ namespace SabreTools.Models.CFB
         /// If Header Major Version is 4, there MUST be 1,023 fields specified
         /// to fill a 4,096-byte sector minus the "Next DIFAT Sector Location" field.
         /// </remarks>
-        public SectorNumber?[]? DIFATSectorNumbers { get; set; }
+        public SectorNumber[]? DIFATSectorNumbers { get; set; }
 
         /// <summary>
         /// The directory entry array is an array of directory entries that
@@ -87,6 +87,6 @@ namespace SabreTools.Models.CFB
         /// all zeroes. The Modified Time field in the root storage directory
         /// entry MAY be all zeroes.
         /// <remarks>
-        public DirectoryEntry?[]? DirectoryEntries { get; set; }
+        public DirectoryEntry[]? DirectoryEntries { get; set; }
     }
 }

CFB/DirectoryEntry.cs

@@ -1,8 +1,10 @@
 using System;
+using System.Runtime.InteropServices;
 
 namespace SabreTools.Models.CFB
 {
     /// <see href="https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-CFB/%5bMS-CFB%5d.pdf"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
     public sealed class DirectoryEntry
     {
         /// <summary>
@@ -16,13 +18,15 @@ namespace SabreTools.Models.CFB
         /// The following characters are illegal and MUST NOT be part of the
         /// name: '/', '\', ':', '!'.
         /// </summary>
-        public string? Name { get; set; }
+        /// <remarks>64 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
+        public string? Name;
 
         /// <summary>
         /// This field MUST be 0x00, 0x01, 0x02, or 0x05, depending on the
         /// actual type of object. All other values are not valid.
         /// </summary>
-        public ushort NameLength { get; set; }
+        public ushort NameLength;
 
         /// <summary>
         /// This field MUST match the length of the Directory Entry Name Unicode
@@ -30,31 +34,36 @@ namespace SabreTools.Models.CFB
         /// terminating null character in the count. This length MUST NOT exceed 64,
         /// the maximum size of the Directory Entry Name field.
         /// </summary>
-        public ObjectType ObjectType { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ObjectType ObjectType;
 
         /// <summary>
         /// This field MUST be 0x00 (red) or 0x01 (black). All other values are not valid.
         /// </summary>
-        public ColorFlag ColorFlag { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ColorFlag ColorFlag;
 
         /// <summary>
         /// This field contains the stream ID of the left sibling. If there
         /// is no left sibling, the field MUST be set to NOSTREAM (0xFFFFFFFF).
         /// </summary>
-        public StreamID LeftSiblingID { get; set; }
+        [MarshalAs(UnmanagedType.U4)]
+        public StreamID LeftSiblingID;
 
         /// <summary>
         /// This field contains the stream ID of the right sibling. If there
         /// is no right sibling, the field MUST be set to NOSTREAM (0xFFFFFFFF).
         /// </summary>
-        public StreamID RightSiblingID { get; set; }
+        [MarshalAs(UnmanagedType.U4)]
+        public StreamID RightSiblingID;
 
         /// <summary>
         /// This field contains the stream ID of a child object. If there is no
         /// child object, including all entries for stream objects, the field
         /// MUST be set to NOSTREAM (0xFFFFFFFF).
         /// </summary>
-        public StreamID ChildID { get; set; }
+        [MarshalAs(UnmanagedType.U4)]
+        public StreamID ChildID;
 
         /// <summary>
         /// This field contains an object class GUID, if this entry is for a
@@ -67,7 +76,7 @@ namespace SabreTools.Models.CFB
         /// this value is not all zeroes, the object class GUID can be used as a
         /// parameter to start applications.
         /// </summary>
-        public Guid CLSID { get; set; }
+        public Guid CLSID;
 
         /// <summary>
         /// This field contains the user-defined flags if this entry is for a storage
@@ -78,7 +87,7 @@ namespace SabreTools.Models.CFB
         /// objects without explicitly setting state bits, it MUST write all zeroes
         /// by default.
         /// </summary>
-        public uint StateBits { get; set; }
+        public uint StateBits;
 
         /// <summary>
         /// This field contains the creation time for a storage object, or all zeroes
@@ -88,7 +97,7 @@ namespace SabreTools.Models.CFB
         /// object, this field MUST be all zeroes, and the creation time is retrieved
         /// or set on the compound file itself.
         /// </summary>
-        public ulong CreationTime { get; set; }
+        public ulong CreationTime;
 
         /// <summary>
         /// This field contains the modification time for a storage object, or all
@@ -98,7 +107,7 @@ namespace SabreTools.Models.CFB
         /// storage object, this field MAY<2> be set to all zeroes, and the modified
         /// time is retrieved or set on the compound file itself.
         /// </summary>
-        public ulong ModifiedTime { get; set; }
+        public ulong ModifiedTime;
 
         /// <summary>
         /// This field contains the first sector location if this is a stream object.
@@ -106,7 +115,7 @@ namespace SabreTools.Models.CFB
         /// mini stream, if the mini stream exists. For a storage object, this field MUST
         /// be set to all zeroes.
         /// </summary>
-        public uint StartingSectorLocation { get; set; }
+        public uint StartingSectorLocation;
 
         /// <summary>
         /// This 64-bit integer field contains the size of the user-defined data if this
@@ -128,6 +137,6 @@ namespace SabreTools.Models.CFB
         /// unless there is a specific reason to do otherwise (for example, a parser whose
         /// purpose is to verify the correctness of a compound file).
         /// </remarks>
-        public ulong StreamSize { get; set; }
+        public ulong StreamSize;
     }
 }

CFB/FileHeader.cs

@@ -1,38 +1,40 @@
 using System;
+using System.Runtime.InteropServices;
 
 namespace SabreTools.Models.CFB
 {
     /// <see href="https://winprotocoldoc.blob.core.windows.net/productionwindowsarchives/MS-CFB/%5bMS-CFB%5d.pdf"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class FileHeader
     {
         /// <summary>
         /// Iddentification signature for the compound file structure, and MUST be
         /// set to the value 0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1.
         /// </summary>
-        public ulong Signature { get; set; }
+        public ulong Signature;
 
         /// <summary>
         /// Reserved and unused class ID that MUST be set to all zeroes (CLSID_NULL)
         /// </summary>
-        public Guid CLSID { get; set; }
+        public Guid CLSID;
 
         /// <summary>
         /// Version number for nonbreaking changes. This field SHOULD be set to
         /// 0x003E if the major version field is either 0x0003 or 0x0004.
         /// </summary>
-        public ushort MinorVersion { get; set; }
+        public ushort MinorVersion;
 
         /// <summary>
         /// Version number for breaking changes. This field MUST be set to either
         /// 0x0003 (version 3) or 0x0004 (version 4).
         /// </summary>
-        public ushort MajorVersion { get; set; }
+        public ushort MajorVersion;
 
         /// <summary>
         /// This field MUST be set to 0xFFFE. This field is a byte order mark for
         /// all integer fields, specifying little-endian byte order.
         /// </summary>
-        public ushort ByteOrder { get; set; }
+        public ushort ByteOrder;
 
         /// <summary>
         /// This field MUST be set to 0x0009, or 0x000c, depending on the Major
@@ -45,19 +47,21 @@ namespace SabreTools.Models.CFB
         /// If Major Version is 4, the Sector Shift MUST be 0x000C, specifying a
         /// sector size of 4096 bytes.
         /// </summary>
-        public ushort SectorShift { get; set; }
+        public ushort SectorShift;
 
         /// <summary>
         /// This field MUST be set to 0x0006. This field specifies the sector size
         /// of the Mini Stream as a power of 2. The sector size of the Mini Stream
         /// MUST be 64 bytes.
         /// </summary>
-        public ushort MiniSectorShift { get; set; }
+        public ushort MiniSectorShift;
 
         /// <summary>
         /// This field MUST be set to all zeroes.
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        /// <remarks>6 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? Reserved;
 
         /// <summary>
         /// This integer field contains the count of the number of directory sectors
@@ -66,18 +70,18 @@ namespace SabreTools.Models.CFB
         /// If Major Version is 3, the Number of Directory Sectors MUST be zero. This
         /// field is not supported for version 3 compound files.
         /// </summary>
-        public uint NumberOfDirectorySectors { get; set; }
+        public uint NumberOfDirectorySectors;
 
         /// <summary>
         /// This integer field contains the count of the number of FAT sectors in the
         /// compound file.
         /// </summary>
-        public uint NumberOfFATSectors { get; set; }
+        public uint NumberOfFATSectors;
 
         /// <summary>
         /// This integer field contains the starting sector number for the directory stream.
         /// </summary>
-        public uint FirstDirectorySectorLocation { get; set; }
+        public uint FirstDirectorySectorLocation;
 
         /// <summary>
         /// This integer field MAY contain a sequence number that is incremented every time
@@ -85,7 +89,7 @@ namespace SabreTools.Models.CFB
         /// This is the field that MUST be set to all zeroes if file transactions are not
         /// implemented.
         /// </summary>
-        public uint TransactionSignatureNumber { get; set; }
+        public uint TransactionSignatureNumber;
 
         /// <summary>
         /// This integer field MUST be set to 0x00001000. This field specifies the maximum
@@ -94,34 +98,36 @@ namespace SabreTools.Models.CFB
         /// greater than or equal to this cutoff size must be allocated as normal sectors from
         /// the FAT.
         /// </summary>
-        public uint MiniStreamCutoffSize { get; set; }
+        public uint MiniStreamCutoffSize;
 
         /// <summary>
         /// This integer field contains the starting sector number for the mini FAT.
         /// </summary>
-        public uint FirstMiniFATSectorLocation { get; set; }
+        public uint FirstMiniFATSectorLocation;
 
         /// <summary>
         /// This integer field contains the count of the number of mini FAT sectors in the
         /// compound file.
         /// </summary>
-        public uint NumberOfMiniFATSectors { get; set; }
+        public uint NumberOfMiniFATSectors;
 
         /// <summary>
         /// This integer field contains the starting sector number for the DIFAT.
         /// </summary>
-        public uint FirstDIFATSectorLocation { get; set; }
+        public uint FirstDIFATSectorLocation;
 
         /// <summary>
         /// This integer field contains the count of the number of DIFAT sectors in the
         /// compound file.
         /// </summary>
-        public uint NumberOfDIFATSectors { get; set; }
+        public uint NumberOfDIFATSectors;
 
         /// <summary>
         /// This array of 32-bit integer fields contains the first 109 FAT sector
         /// locations of the compound file
         /// </summary>
-        public SectorNumber?[]? DIFAT { get; set; }
+        /// <remarks>109 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 109)]
+        public SectorNumber[]? DIFAT;
     }
 }

CFB/SummaryInformation.cs

@@ -75,7 +75,7 @@ namespace SabreTools.Models.CFB
         /// Properties
         /// </summary>
         /// <remarks>Each Variant might be followed by an index and offset value</remarks>
-        public Variant?[]? Properties { get; set; }
+        public Variant[]? Properties { get; set; }
 
         #endregion
     }

CHD/CompressedMapEntryV5.cs

@@ -1,28 +1,31 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.CHD
 {
     /// <see href="https://github.com/mamedev/mame/blob/master/src/lib/util/chd.h"/> 
-    public class CompressedMapEntryV5
+    [StructLayout(LayoutKind.Sequential)]
+    public sealed class CompressedMapEntryV5
     {
         /// <summary>
         /// Compression type
         /// </summary>
-        public byte Compression { get; set; }
+        public byte Compression;
 
         /// <summary>
         /// Compressed length
         /// </summary>
         /// <remarks>Actually UInt24</remarks>
-        public uint CompLength { get; set; }
+        public uint CompLength;
 
         /// <summary>
         /// Offset
         /// </summary>
         /// <remarks>Actually UInt48</remarks>
-        public ulong Offset { get; set; }
+        public ulong Offset;
 
         /// <summary>
         /// CRC-16 of the data
         /// </summary>
-        public ushort CRC { get; set; }
+        public ushort CRC;
     }
 }

CHD/CompressedMapHeaderV5.cs

@@ -1,42 +1,45 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.CHD
 {
     /// <see href="https://github.com/mamedev/mame/blob/master/src/lib/util/chd.h"/> 
-    public class CompressedMapHeaderV5
+    [StructLayout(LayoutKind.Sequential)]
+    public sealed class CompressedMapHeaderV5
     {
         /// <summary>
         /// Length of compressed map
         /// </summary>
-        public uint Length { get; set; }
+        public uint Length;
 
         /// <summary>
         /// Offset of first block
         /// </summary>
         /// <remarks>Actually UInt48</remarks>
-        public ulong DataStart { get; set; }
+        public ulong DataStart;
 
         /// <summary>
         /// CRC-16 of the map
         /// </summary>
-        public ushort CRC { get; set; }
+        public ushort CRC;
 
         /// <summary>
         /// Bits used to encode complength
         /// </summary>
-        public byte LengthBits { get; set; }
+        public byte LengthBits;
 
         /// <summary>
         /// Bits used to encode self-refs
         /// </summary>
-        public byte HunkBits { get; set; }
+        public byte HunkBits;
 
         /// <summary>
         /// Bits used to encode parent unit refs
         /// </summary>
-        public byte ParentUnitBits { get; set; }
+        public byte ParentUnitBits;
 
         /// <summary>
         /// Future use
         /// </summary>
-        public byte Reserved { get; set; }
+        public byte Reserved;
     }
 }

CHD/MapV1.cs

@@ -1,16 +1,19 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.CHD
 {
     /// <see href="https://github.com/mamedev/mame/blob/master/src/lib/util/chd.h"/> 
-    public class MapV1
+    [StructLayout(LayoutKind.Sequential)]
+    public sealed class MapV1
     {
         /// <summary>
         /// Starting offset within the file
         /// </summary>
-        public ulong StartingOffset { get; set; }
+        public ulong StartingOffset;
 
         /// <summary>
         /// Length of data; If == hunksize, data is uncompressed
         /// </summary>
-        public ulong Length { get; set; }
+        public ulong Length;
     }
 }

CHD/MapV3.cs

@@ -1,31 +1,34 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.CHD
 {
     /// <see href="https://github.com/mamedev/mame/blob/master/src/lib/util/chd.h"/> 
-    public class MapV3
+    [StructLayout(LayoutKind.Sequential)]
+    public sealed class MapV3
     {
         /// <summary>
         /// Starting offset within the file
         /// </summary>
-        public ulong StartingOffset { get; set; }
+        public ulong StartingOffset;
 
         /// <summary>
         /// 32-bit CRC of the uncompressed data
         /// </summary>
-        public uint CRC32 { get; set; }
+        public uint CRC32;
 
         /// <summary>
         /// Lower 16 bits of length
         /// </summary>
-        public ushort LengthLo { get; set; }
+        public ushort LengthLo;
 
         /// <summary>
         /// Upper 8 bits of length
         /// </summary>
-        public byte LengthHi { get; set; }
+        public byte LengthHi;
 
         /// <summary>
         /// Flags, indicating compression info
         /// </summary>
-        public byte Flags { get; set; }
+        public byte Flags;
     }
 }

CHD/UncompressedMapV5.cs

@@ -1,11 +1,14 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.CHD
 {
     /// <see href="https://github.com/mamedev/mame/blob/master/src/lib/util/chd.h"/> 
+    [StructLayout(LayoutKind.Sequential)]
     public class UncompressedMapV5
     {
         /// <summary>
         /// Starting offset / hunk size
         /// </summary>
-        public uint StartingOffset { get; set; }
+        public uint StartingOffset;
     }
 }

DVD/AudioSubPictureAttributesTable.cs

@@ -1,6 +1,6 @@
 namespace SabreTools.Models.DVD
 {
-    /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo.html"/>
+    /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
     public sealed class AudioSubPictureAttributesTable
     {
         /// <summary>
@@ -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 VTS_ATRT)
@@ -21,11 +21,12 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Offset to VTS_ATRT n
         /// </summary>
+        /// <remarks>NumberOfTitleSets entries</remarks>
         public uint[]? Offsets { get; set; }
 
         /// <summary>
         /// Entries
         /// </summary>
-        public AudioSubPictureAttributesTableEntry?[]? Entries { get; set; }
+        public AudioSubPictureAttributesTableEntry[]? Entries { get; set; }
     }
 }

DVD/AudioSubPictureAttributesTableEntry.cs

@@ -1,6 +1,6 @@
 namespace SabreTools.Models.DVD
 {
-    /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo.html"/>
+    /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
     public sealed class AudioSubPictureAttributesTableEntry
     {
         /// <summary>

DVD/CellAddressTable.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)
@@ -21,6 +21,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// 12-byte entries
         /// </summary>
-        public CellAddressTableEntry?[]? Entries { get; set; }
+        /// <remarks>NumberOfVOBIDs entries</remarks>
+        public CellAddressTableEntry[]? Entries { get; set; }
     }
 }

DVD/LanguageUnitTable.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 last LU)
@@ -22,11 +22,13 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Language Units
         /// </summary>
-        public LanguageUnitTableEntry?[]? Entries { get; set; }
+        /// <remarks>NumberOfVOBIDs entries</remarks>
+        public LanguageUnitTableEntry[]? Entries { get; set; }
 
         /// <summary>
         /// Program Chains
         /// </summary>
-        public ProgramChainTable?[]? ProgramChains { get; set; }
+        /// <remarks>NumberOfVOBIDs entries</remarks>
+        public ProgramChainTable[]? ProgramChains { get; set; }
     }
 }

DVD/LanguageUnitTableEntry.cs

@@ -7,7 +7,7 @@ namespace SabreTools.Models.DVD
     public sealed class LanguageUnitTableEntry
     {
         /// <summary>
-        /// 	ISO639 language code
+        /// ISO639 language code
         /// </summary>
         public ushort ISO639LanguageCode;
 

DVD/ParentalManagementMasksTable.cs

@@ -25,7 +25,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Entries
         /// </summary>
-        public ParentalManagementMasksTableEntry?[]? Entries { get; set; }
+        public ParentalManagementMasksTableEntry[]? Entries { get; set; }
 
         /// <summary>
         /// The PTL_MAIT contains the 16-bit masks for the VMG and

DVD/ProgramChainTable.cs

@@ -22,6 +22,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Program Chains
         /// </summary>
-        public ProgramChainTableEntry?[]? Entries { get; set; }
+        /// <remarks>NumberOfProgramChains entries</remarks>
+        public ProgramChainTableEntry[]? Entries { get; set; }
     }
 }

DVD/TitlesTable.cs

@@ -21,6 +21,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// 12-byte entries
         /// </summary>
-        public TitlesTableEntry?[]? Entries { get; set; }
+        /// <remarks>NumberOfTitles entries</remarks>
+        public TitlesTableEntry[]? Entries { get; set; }
     }
 }

DVD/VideoManagerIFO.cs

@@ -1,4 +1,3 @@
-using System.Drawing;
 using System.Runtime.InteropServices;
 
 namespace SabreTools.Models.DVD

GCF/DirectoryEntry.cs

@@ -1,46 +1,45 @@
+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 DirectoryEntry
     {
         /// <summary>
         /// Offset to the directory item name from the end of the directory items.
         /// </summary>
-        public uint NameOffset { get; set; }
-
-        /// <summary>
-        /// Directory item name from the end of the directory items.
-        /// </summary>
-        public string? Name { get; set; }
+        public uint NameOffset;
 
         /// <summary>
         /// Size of the item.  (If file, file size.  If folder, num items.)
         /// </summary>
-        public uint ItemSize { get; set; }
+        public uint ItemSize;
 
         /// <summary>
         /// Checksome index. (0xFFFFFFFF == None).
         /// </summary>
-        public uint ChecksumIndex { get; set; }
+        public uint ChecksumIndex;
 
         /// <summary>
         /// Flags for the directory item.  (0x00000000 == Folder).
         /// </summary>
-        public HL_GCF_FLAG DirectoryFlags { get; set; }
+        [MarshalAs(UnmanagedType.U4)]
+        public HL_GCF_FLAG DirectoryFlags;
 
         /// <summary>
         /// Index of the parent directory item.  (0xFFFFFFFF == None).
         /// </summary>
-        public uint ParentIndex { get; set; }
+        public uint ParentIndex;
 
         /// <summary>
         /// Index of the next directory item.  (0x00000000 == None).
         /// </summary>
-        public uint NextIndex { get; set; }
+        public uint NextIndex;
 
         /// <summary>
         /// Index of the first directory item.  (0x00000000 == None).
         /// </summary>
-        public uint FirstIndex { get; set; }
+        public uint FirstIndex;
     }
 }

InstallShieldArchiveV3/Constants.cs

@@ -0,0 +1,7 @@
+namespace SabreTools.Models.InstallShieldArchiveV3
+{
+    public static class Constants
+    {
+        public const uint HeaderSignature = 0x8C655D13;
+    }
+}

InstallShieldArchiveV3/Directory.cs

@@ -6,9 +6,20 @@ namespace SabreTools.Models.InstallShieldArchiveV3
     [StructLayout(LayoutKind.Sequential)]
     public class Directory
     {
+        /// <summary>
+        /// Number of files in the directory
+        /// </summary>
+        public ushort FileCount;
+
+        /// <summary>
+        /// Size of the chunk
+        /// </summary>
+        public ushort ChunkSize;
+
+        /// <summary>
+        /// Byte-length-prefixed ASCII string
+        /// </summary>
         [MarshalAs(UnmanagedType.BStr)]
         public string? Name;
-
-        public ushort FileCount;
     }
 }

InstallShieldCabinet/Constants.cs

@@ -8,10 +8,14 @@ namespace SabreTools.Models.InstallShieldCabinet
 
         public const uint SignatureUInt32 = 0x28635349;
 
+        public const string HEADER_SUFFIX = "hdr";
+
+        public const string CABINET_SUFFIX = "cab";
+
         public const int COMMON_HEADER_SIZE = 20;
 
         public const int VOLUME_HEADER_SIZE_V5 = 40;
-        
+
         public const int VOLUME_HEADER_SIZE_V6 = 64;
 
         // TODO: Determine how the value "71" was chosen here

InstallShieldCabinet/Descriptor.cs

@@ -3,6 +3,7 @@ using System.Runtime.InteropServices;
 namespace SabreTools.Models.InstallShieldCabinet
 {
     /// <see href="https://github.com/twogood/unshield/blob/main/lib/cabfile.h"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class Descriptor
     {
         /// <summary>

LinearExecutable/ImportModuleNameTableEntry.cs

@@ -24,7 +24,7 @@
         /// This defines the length of the string in bytes. The length of each
         /// ascii name string is limited to 127 characters.
         /// </remarks>
-        public byte Length { get; set; }
+        public byte Length { get; set; } // TODO: Remove in lieu of AnsiBStr
 
         /// <summary>
         /// ASCII String.

LinearExecutable/ImportProcedureNameTableEntry.cs

@@ -32,7 +32,7 @@
         /// linear EXE module and will be used in the future for parameter type
         /// checking.
         /// </remarks>
-        public byte Length { get; set; }
+        public byte Length { get; set; } // TODO: Remove in lieu of AnsiBStr
 
         /// <summary>
         /// ASCII String.

LinearExecutable/NonResidentNamesTableEntry.cs

@@ -39,7 +39,7 @@
         /// signifies that additional information is contained in the linear EXE module and
         /// will be used in the future for parameter type checking.
         /// </remarks>
-        public byte Length { get; set; }
+        public byte Length { get; set; } // TODO: Remove in lieu of AnsiBStr
 
         /// <summary>
         /// ASCII String.

LinearExecutable/ResidentNamesTableEntry.cs

@@ -39,7 +39,7 @@
         /// signifies that additional information is contained in the linear EXE module and
         /// will be used in the future for parameter type checking.
         /// </remarks>
-        public byte Length { get; set; }
+        public byte Length { get; set; } // TODO: Remove in lieu of AnsiBStr
 
         /// <summary>
         /// ASCII String.

MSDOS/ExecutableHeader.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.MSDOS
 {
     /// <summary>
@@ -6,6 +8,7 @@ namespace SabreTools.Models.MSDOS
     /// </summary>
     /// <see href="https://wiki.osdev.org/MZ"/>
     /// <see href="http://www.pinvoke.net/default.aspx/Structures.IMAGE_DOS_HEADER"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class ExecutableHeader
     {
         #region Standard Fields
@@ -13,23 +16,25 @@ namespace SabreTools.Models.MSDOS
         /// <summary>
         /// 0x5A4D (ASCII for 'M' and 'Z')
         /// </summary>
-        public string? Magic { get; set; }
+        /// <remarks>15 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 2)]
+        public string? Magic;
 
         /// <summary>
         /// Number of bytes in the last page.
         /// </summary>
-        public ushort LastPageBytes { get; set; }
+        public ushort LastPageBytes;
 
         /// <summary>
         /// Number of whole/partial pages.
         /// </summary>
         /// <remarks>A page (or block) is 512 bytes long.</remarks>
-        public ushort Pages { get; set; }
+        public ushort Pages;
 
         /// <summary>
         /// Number of entries in the relocation table.
         /// </summary>
-        public ushort RelocationItems { get; set; }
+        public ushort RelocationItems;
 
         /// <summary>
         /// The number of paragraphs taken up by the header. It can be any value, as the loader
@@ -38,57 +43,57 @@ namespace SabreTools.Models.MSDOS
         /// own header metadata, or put the relocation table there, or use it for any other purpose. [08]
         /// </summary>
         /// <remarks>A paragraph is 16 bytes in size</remarks>
-        public ushort HeaderParagraphSize { get; set; }
+        public ushort HeaderParagraphSize;
 
         /// <summary>
         /// The number of paragraphs required by the program, excluding the PSP and program image.
         /// If no free block is big enough, the loading stops.
         /// </summary>
         /// <remarks>A paragraph is 16 bytes in size</remarks>
-        public ushort MinimumExtraParagraphs { get; set; }
+        public ushort MinimumExtraParagraphs;
 
         /// <summary>
         /// The number of paragraphs requested by the program.
         /// If no free block is big enough, the biggest one possible is allocated.
         /// </summary>
         /// <remarks>A paragraph is 16 bytes in size</remarks>
-        public ushort MaximumExtraParagraphs { get; set; }
+        public ushort MaximumExtraParagraphs;
 
         /// <summary>
         /// Relocatable segment address for SS.
         /// </summary>
-        public ushort InitialSSValue { get; set; }
+        public ushort InitialSSValue;
 
         /// <summary>
         /// Initial value for SP.
         /// </summary>
-        public ushort InitialSPValue { get; set; }
+        public ushort InitialSPValue;
 
         /// <summary>
         /// When added to the sum of all other words in the file, the result should be zero.
         /// </summary>
-        public ushort Checksum { get; set; }
+        public ushort Checksum;
 
         /// <summary>
         /// Initial value for IP. [14]
         /// </summary>
-        public ushort InitialIPValue { get; set; }
+        public ushort InitialIPValue;
 
         /// <summary>
         /// Relocatable segment address for CS.
         /// </summary>
-        public ushort InitialCSValue { get; set; }
+        public ushort InitialCSValue;
 
         /// <summary>
         /// The (absolute) offset to the relocation table.
         /// </summary>
-        public ushort RelocationTableAddr { get; set; }
+        public ushort RelocationTableAddr;
 
         /// <summary>
         /// Value used for overlay management.
         /// If zero, this is the main executable.
         /// </summary>
-        public ushort OverlayNumber { get; set; }
+        public ushort OverlayNumber;
 
         #endregion
 
@@ -97,27 +102,31 @@ namespace SabreTools.Models.MSDOS
         /// <summary>
         /// Reserved words
         /// </summary>
-        public ushort[]? Reserved1 { get; set; } = new ushort[4];
+        /// <remarks>4 entries/remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4)]
+        public ushort[]? Reserved1;
 
         /// <summary>
         /// Defined by name but no other information is given; typically zeroes
         /// </summary>
-        public ushort OEMIdentifier { get; set; }
+        public ushort OEMIdentifier;
 
         /// <summary>
         /// Defined by name but no other information is given; typically zeroes
         /// </summary>
-        public ushort OEMInformation { get; set; }
+        public ushort OEMInformation;
 
         /// <summary>
         /// Reserved words
         /// </summary>
-        public ushort[]? Reserved2 { get; set; } = new ushort[10];
+        /// <remarks>10 entries/remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 10)]
+        public ushort[]? Reserved2;
 
         /// <summary>
         /// Starting address of the PE header
         /// </summary>
-        public uint NewExeHeaderAddr { get; set; }
+        public uint NewExeHeaderAddr;
 
         #endregion
     }

MoPaQ/BetTable.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.MoPaQ
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.MoPaQ
 {
     /// <summary>
     /// The BET table is present if the BetTablePos64 member of MPQ header is set
@@ -14,7 +16,8 @@
         /// <summary>
         /// 'BET\x1A'
         /// </summary>
-        public string? Signature { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? Signature;
 
         /// <summary>
         /// Version. Seems to be always 1

MoPaQ/HetTable.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.MoPaQ
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.MoPaQ
 {
     /// <summary>
     /// The HET table is present if the HetTablePos64 member of MPQ header is
@@ -15,7 +17,8 @@
         /// <summary>
         /// 'HET\x1A'
         /// </summary>
-        public string? Signature { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? Signature;
 
         /// <summary>
         /// Version. Seems to be always 1

MoPaQ/PatchInfo.cs

@@ -1,35 +1,42 @@
-namespace SabreTools.Models.MoPaQ
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.MoPaQ
 {
     /// <summary>
     /// This structure contains size of the patch, flags and also MD5 of the patch.
     /// </summary>
     /// <see href="http://zezula.net/en/mpq/mpqformat.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class PatchInfo
     {
         /// <summary>
         /// Length of patch info header, in bytes
         /// </summary>
-        public uint Length { get; set; }
+        public uint Length;
 
         /// <summary>
         /// Flags. 0x80000000 = MD5 (?)
         /// </summary>
-        public uint Flags { get; set; }
+        public uint Flags;
 
         /// <summary>
         /// Uncompressed size of the patch file
         /// </summary>
-        public uint DataSize { get; set; }
+        public uint DataSize;
 
         /// <summary>
         /// MD5 of the entire patch file after decompression
         /// </summary>
         /// <remarks>0x10 bytes</remarks>
-        public byte[]? MD5 { get; set; }
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x10)]
+        public byte[]? MD5;
 
         /// <summary>
         /// The sector offset table (variable length)
         /// </summary>
-        public uint[]? SectorOffsetTable { get; set; }
+        /// <remarks>0 entries</remarks>
+        /// TODO: Determine the number of entries
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0)]
+        public uint[]? SectorOffsetTable;
     }
 }

MoPaQ/UserData.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.MoPaQ
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.MoPaQ
 {
     /// <summary>
     /// MPQ User Data are optional, and is commonly used in custom maps for
@@ -6,28 +8,31 @@
     /// from where the MPQ header should be searched.
     /// </summary>
     /// <see href="http://zezula.net/en/mpq/mpqformat.html"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class UserData
     {
         /// <summary>
         /// The user data signature
         /// </summary>
         /// <see cref="SignatureValue"/>
-        public string? Signature { get; set; }
+        /// <remarks>4 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? Signature;
 
         /// <summary>
         /// Maximum size of the user data
         /// </summary>
-        public uint UserDataSize { get; set; }
+        public uint UserDataSize;
 
         /// <summary>
         /// Offset of the MPQ header, relative to the beginning of this header
         /// </summary>
-        public uint HeaderOffset { get; set; }
+        public uint HeaderOffset;
 
         /// <summary>
         /// Appears to be size of user data header (Starcraft II maps)
         /// </summary>
-        public uint UserDataHeaderSize { get; set; }
+        public uint UserDataHeaderSize;
 
         // TODO: Does this area contain extra data that should be read in?
     }

N3DS/ARM11KernelCapabilities.cs

@@ -1,9 +1,12 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <summary>
     /// The kernel capability descriptors are passed to svcCreateProcess.
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header#ARM11_Kernel_Capabilities"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ARM11KernelCapabilities
     {
         /// <summary>
@@ -34,11 +37,15 @@
         /// 13	Process has access to CPU core 2 (New3DS only)
         /// </summary>
         /// TODO: Make enum for flag values
-        public uint[]? Descriptors { get; set; }
+        /// <remarks>28 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 28)]
+        public uint[]? Descriptors;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        /// <remarks>0x10 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x10)]
+        public byte[]? Reserved;
     }
 }

N3DS/ARM11LocalSystemCapabilities.cs

@@ -1,66 +1,81 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header#ARM11_Local_System_Capabilities"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ARM11LocalSystemCapabilities
     {
         /// <summary>
         /// Program ID
         /// </summary>
-        public ulong ProgramID { get; set; }
+        public ulong ProgramID;
 
         /// <summary>
         /// Core version (The Title ID low of the required FIRM)
         /// </summary>
-        public uint CoreVersion { get; set; }
+        public uint CoreVersion;
 
         /// <summary>
         /// Flag1 (implemented starting from 8.0.0-18).
         /// </summary>
-        public ARM11LSCFlag1 Flag1 { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ARM11LSCFlag1 Flag1;
 
         /// <summary>
         /// Flag2 (implemented starting from 8.0.0-18).
         /// </summary>
-        public ARM11LSCFlag2 Flag2 { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ARM11LSCFlag2 Flag2;
 
         /// <summary>
         /// Flag0
         /// </summary>
-        public ARM11LSCFlag0 Flag0 { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ARM11LSCFlag0 Flag0;
 
         /// <summary>
         /// Priority
         /// </summary>
-        public byte Priority { get; set; }
+        public byte Priority;
 
         /// <summary>
         /// Resource limit descriptors. The first byte here controls the maximum allowed CpuTime.
         /// </summary>
-        public ushort[]? ResourceLimitDescriptors { get; set; }
+        /// <remarks>16 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+        public ushort[]? ResourceLimitDescriptors;
 
         /// <summary>
         /// Storage info
         /// </summary>
-        public StorageInfo? StorageInfo { get; set; }
+        public StorageInfo? StorageInfo;
 
         /// <summary>
         /// Service access control
         /// </summary>
-        public ulong[]? ServiceAccessControl { get; set; }
+        /// <remarks>32 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
+        public ulong[]? ServiceAccessControl;
 
         /// <summary>
         /// Extended service access control, support for this was implemented with 9.3.0-X.
         /// </summary>
-        public ulong[]? ExtendedServiceAccessControl { get; set; }
+        /// <remarks>2 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2)]
+        public ulong[]? ExtendedServiceAccessControl;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        /// <remarks>0x0F bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x0F)]
+        public byte[]? Reserved;
 
         /// <summary>
         /// Resource limit category. (0 = APPLICATION, 1 = SYS_APPLET, 2 = LIB_APPLET, 3 = OTHER (sysmodules running under the BASE memregion))
         /// </summary>
-        public ResourceLimitCategory ResourceLimitCategory { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ResourceLimitCategory ResourceLimitCategory;
     }
 }

N3DS/ARM9AccessControl.cs

@@ -1,17 +1,22 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header#ARM9_Access_Control"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ARM9AccessControl
     {
         /// <summary>
         /// Descriptors
         /// </summary>
-        public byte[]? Descriptors { get; set; }
+        /// <remarks>15 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 15)]
+        public byte[]? Descriptors;
 
         /// <summary>
         /// ARM9 Descriptor Version. Originally this value had to be ≥ 2.
         /// Starting with 9.3.0-X this value has to be either value 2 or value 3.
         /// </summary>
-        public byte DescriptorVersion { get; set; }
+        public byte DescriptorVersion;
     }
 }

N3DS/AccessControlInfo.cs

@@ -1,21 +1,24 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header#Access_Control_Info"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class AccessControlInfo
     {
         /// <summary>
         /// ARM11 local system capabilities
         /// </summary>
-        public ARM11LocalSystemCapabilities? ARM11LocalSystemCapabilities { get; set; }
+        public ARM11LocalSystemCapabilities? ARM11LocalSystemCapabilities;
 
         /// <summary>
         /// ARM11 kernel capabilities
         /// </summary>
-        public ARM11KernelCapabilities? ARM11KernelCapabilities { get; set; }
+        public ARM11KernelCapabilities? ARM11KernelCapabilities;
 
         /// <summary>
         /// ARM9 access control
         /// </summary>
-        public ARM9AccessControl? ARM9AccessControl { get; set; }
+        public ARM9AccessControl? ARM9AccessControl;
     }
 }

N3DS/CIAHeader.cs

@@ -1,51 +1,56 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/CIA#CIA_Header"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class CIAHeader
     {
         /// <summary>
         /// Archive header size, usually 0x2020 bytes
         /// </summary>
-        public uint HeaderSize { get; set; }
+        public uint HeaderSize;
 
         /// <summary>
         /// Type
         /// </summary>
-        public ushort Type { get; set; }
+        public ushort Type;
 
         /// <summary>
         /// Version
         /// </summary>
-        public ushort Version { get; set; }
+        public ushort Version;
 
         /// <summary>
         /// Certificate chain size
         /// </summary>
-        public uint CertificateChainSize { get; set; }
+        public uint CertificateChainSize;
 
         /// <summary>
         /// Ticket size
         /// </summary>
-        public uint TicketSize { get; set; }
+        public uint TicketSize;
 
         /// <summary>
         /// TMD file size
         /// </summary>
-        public uint TMDFileSize { get; set; }
+        public uint TMDFileSize;
 
         /// <summary>
         /// Meta size (0 if no Meta data is present)
         /// </summary>
-        public uint MetaSize { get; set; }
+        public uint MetaSize;
 
         /// <summary>
         /// Content size
         /// </summary>
-        public ulong ContentSize { get; set; }
+        public ulong ContentSize;
 
         /// <summary>
         /// Content Index
         /// </summary>
-        public byte[]? ContentIndex { get; set; }
+        /// <remarks>0x2000 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x2000)]
+        public byte[]? ContentIndex;
     }
 }

N3DS/CardInfoHeader.cs

@@ -1,61 +1,74 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCSD#Card_Info_Header"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class CardInfoHeader
     {
         /// <summary>
         /// CARD2: Writable Address In Media Units (For 'On-Chip' Savedata). CARD1: Always 0xFFFFFFFF.
         /// </summary>
-        public uint WritableAddressMediaUnits { get; set; }
+        public uint WritableAddressMediaUnits;
 
         /// <summary>
         /// Card Info Bitmask
         /// </summary>
-        public uint CardInfoBitmask { get; set; }
+        public uint CardInfoBitmask;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved1 { get; set; }
+        /// <remarks>0xF8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0xF8)]
+        public byte[]? Reserved1;
 
         /// <summary>
         /// Filled size of cartridge
         /// </summary>
-        public uint FilledSize { get; set; }
+        public uint FilledSize;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved2 { get; set; }
+        /// <remarks>0x0C bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x0C)]
+        public byte[]? Reserved2;
 
         /// <summary>
         /// Title version
         /// </summary>
-        public ushort TitleVersion { get; set; }
+        public ushort TitleVersion;
 
         /// <summary>
         /// Card revision
         /// </summary>
-        public ushort CardRevision { get; set; }
+        public ushort CardRevision;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved3 { get; set; }
+        /// <remarks>0x0C bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x0C)]
+        public byte[]? Reserved3;
 
         /// <summary>
         /// Title ID of CVer in included update partition
         /// </summary>
-        public byte[]? CVerTitleID { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public byte[]? CVerTitleID;
 
         /// <summary>
         /// Version number of CVer in included update partition
         /// </summary>
-        public ushort CVerVersionNumber { get; set; }
+        public ushort CVerVersionNumber;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved4 { get; set; }
+        /// <remarks>0xCD6 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0xCD6)]
+        public byte[]? Reserved4;
     }
 }

N3DS/CodeSetInfo.cs

@@ -1,21 +1,24 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header#Code_Set_Info"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class CodeSetInfo
     {
         /// <summary>
         /// Address
         /// </summary>
-        public uint Address { get; set; }
+        public uint Address;
 
         /// <summary>
         /// Physical region size (in page-multiples)
         /// </summary>
-        public uint PhysicalRegionSizeInPages { get; set; }
+        public uint PhysicalRegionSizeInPages;
 
         /// <summary>
         /// Size (in bytes)
         /// </summary>
-        public uint SizeInBytes { get; set; }
+        public uint SizeInBytes;
     }
 }

N3DS/ContentChunkRecord.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.N3DS
 {
     /// <summary>
@@ -5,12 +7,13 @@ namespace SabreTools.Models.N3DS
     /// (Determined by "Content Count" in the TMD Header).
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/Title_metadata#Content_chunk_records"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ContentChunkRecord
     {
         /// <summary>
         /// Content id
         /// </summary>
-        public uint ContentId { get; set; }
+        public uint ContentId;
 
         /// <summary>
         /// Content index
@@ -18,21 +21,23 @@ namespace SabreTools.Models.N3DS
         /// <remarks>
         /// This does not apply to DLC.
         /// </remarks>
-        public ContentIndex ContentIndex { get; set; }
+        public ContentIndex ContentIndex;
 
         /// <summary>
         /// Content type
         /// </summary>
-        public TMDContentType ContentType { get; set; }
+        public TMDContentType ContentType;
 
         /// <summary>
         /// Content size
         /// </summary>
-        public ulong ContentSize { get; set; }
+        public ulong ContentSize;
 
         /// <summary>
         /// SHA-256 hash
         /// </summary>
-        public byte[]? SHA256Hash { get; set; }
+        /// <remarks>0x20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x20)]
+        public byte[]? SHA256Hash;
     }
 }

N3DS/ContentInfoRecord.cs

@@ -1,24 +1,29 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.N3DS
 {
     /// <summary>
     /// There are 64 of these records, usually only the first is used.
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/Title_metadata#Content_Info_Records"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ContentInfoRecord
     {
         /// <summary>
         /// Content index offset
         /// </summary>
-        public ushort ContentIndexOffset { get; set; }
+        public ushort ContentIndexOffset;
 
         /// <summary>
         /// Content command count [k]
         /// </summary>
-        public ushort ContentCommandCount { get; set; }
+        public ushort ContentCommandCount;
 
         /// <summary>
         /// SHA-256 hash of the next k content records that have not been hashed yet
         /// </summary>
-        public byte[]? UnhashedContentRecordsSHA256Hash { get; set; }
+        /// <remarks>0x20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x20)]
+        public byte[]? UnhashedContentRecordsSHA256Hash;
     }
 }

N3DS/DevelopmentCardInfoHeader.cs

@@ -1,31 +1,40 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCSD#Development_Card_Info_Header_Extension"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DevelopmentCardInfoHeader
     {
         /// <summary>
         /// InitialData
         /// </summary>
-        public InitialData? InitialData { get; set; }
+        public InitialData? InitialData;
 
         /// <summary>
         /// CardDeviceReserved1
         /// </summary>
-        public byte[]? CardDeviceReserved1 { get; set; }
+        /// <remarks>0x200 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x200)]
+        public byte[]? CardDeviceReserved1;
 
         /// <summary>
         /// TitleKey
         /// </summary>
-        public byte[]? TitleKey { get; set; }
+        /// <remarks>0x10 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x10)]
+        public byte[]? TitleKey;
 
         /// <summary>
         /// CardDeviceReserved2
         /// </summary>
-        public byte[]? CardDeviceReserved2 { get; set; }
+        /// <remarks>0x1BF0 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x1BF0)]
+        public byte[]? CardDeviceReserved2;
 
         /// <summary>
         /// TestData
         /// </summary>
-        public TestData? TestData { get; set; }
+        public TestData? TestData;
     }
 }

N3DS/ExeFSFileHeader.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <summary>
     /// There are a maximum of 10 file headers in the ExeFS format. (This maximum
@@ -8,26 +10,24 @@
     /// the currently define size of 0x200 bytes.)
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/ExeFS#File_headers"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class ExeFSFileHeader
     {
         /// <summary>
         /// File name
         /// </summary>
-        public string? FileName { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
+        public string? FileName;
 
         /// <summary>
         /// File offset
         /// </summary>
-        public uint FileOffset { get; set; }
+        public uint FileOffset;
 
         /// <summary>
         /// File size
         /// </summary>
-        public uint FileSize { get; set; }
-
-        /// <summary>
-        /// SHA256 hash calculated over the entire file contents
-        /// </summary>
-        public byte[]? FileHash { get; set; }
+        public uint FileSize;
     }
 }

N3DS/ExeFSHeader.cs

@@ -21,6 +21,7 @@
         /// <summary>
         /// Reserved
         /// </summary>
+        /// <remarks>0x20 bytes</remarks>
         public byte[]? Reserved { get; set; }
 
         /// <summary>

N3DS/InitialData.cs

@@ -1,36 +1,49 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCSD#InitialData"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class InitialData
     {
         /// <summary>
         /// Card seed keyY (first u64 is Media ID (same as first NCCH partitionId))
         /// </summary>
-        public byte[]? CardSeedKeyY { get; set; }
+        /// <remarks>0x10 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x10)]
+        public byte[]? CardSeedKeyY;
 
         /// <summary>
         /// Encrypted card seed (AES-CCM, keyslot 0x3B for retail cards, see CTRCARD_SECSEED)
         /// </summary>
-        public byte[]? EncryptedCardSeed { get; set; }
+        /// <remarks>0x10 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x10)]
+        public byte[]? EncryptedCardSeed;
 
         /// <summary>
         /// Card seed AES-MAC
         /// </summary>
-        public byte[]? CardSeedAESMAC { get; set; }
+        /// <remarks>0x10 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x10)]
+        public byte[]? CardSeedAESMAC;
 
         /// <summary>
         /// Card seed nonce
         /// </summary>
-        public byte[]? CardSeedNonce { get; set; }
+        /// <remarks>0x0C bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x0C)]
+        public byte[]? CardSeedNonce;
 
         /// <summary>
         /// Reserved3
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        /// <remarks>0xC4 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0xC4)]
+        public byte[]? Reserved;
 
         /// <summary>
         /// Copy of first NCCH header (excluding RSA signature)
         /// </summary>
-        public NCCHHeader? BackupHeader { get; set; }
+        public NCCHHeader? BackupHeader;
     }
 }

N3DS/MetaData.cs

@@ -1,32 +1,43 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/CIA#Meta"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class MetaData
     {
         /// <summary>
         /// Title ID dependency list - Taken from the application's ExHeader
         /// </summary>
         /// TODO: Determine numeric format of each entry
-        public byte[]? TitleIDDependencyList { get; set; }
+        /// <remarks>0x180 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x180)]
+        public byte[]? TitleIDDependencyList;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved1 { get; set; }
+        /// <remarks>0x180 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x180)]
+        public byte[]? Reserved1;
 
         /// <summary>
         /// Core Version
         /// </summary>
-        public uint CoreVersion { get; set; }
+        public uint CoreVersion;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved2 { get; set; }
+        /// <remarks>0xFC bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0xFC)]
+        public byte[]? Reserved2;
 
         /// <summary>
         /// Icon Data(.ICN) - Taken from the application's ExeFS
         /// </summary>
-        public byte[]? IconData { get; set; }
+        /// <remarks>0x36C0 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x36C0)]
+        public byte[]? IconData;
     }
 }

N3DS/NCCHExtendedHeader.cs

@@ -1,36 +1,43 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <summary>
     /// The exheader has two sections:
-    /// - The actual exheader data, containing System Control Info (SCI) and Access Control Info (ACI) { get; set; }
+    /// - The actual exheader data, containing System Control Info (SCI) and Access Control Info (ACI);
     /// - A signed copy of NCCH HDR public key, and exheader ACI. This version of the ACI is used as limitation to the actual ACI.
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class NCCHExtendedHeader
     {
         /// <summary>
         /// SCI
         /// </summary>
-        public SystemControlInfo? SCI { get; set; }
+        public SystemControlInfo? SCI;
 
         /// <summary>
         /// ACI
         /// </summary>
-        public AccessControlInfo? ACI { get; set; }
+        public AccessControlInfo? ACI;
 
         /// <summary>
         /// AccessDesc signature (RSA-2048-SHA256)
         /// </summary>
-        public byte[]? AccessDescSignature { get; set; }
+        /// <remarks>0x100 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x100)]
+        public byte[]? AccessDescSignature;
 
         /// <summary>
         /// NCCH HDR RSA-2048 public key
         /// </summary>
-        public byte[]? NCCHHDRPublicKey { get; set; }
+        /// <remarks>0x100 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x100)]
+        public byte[]? NCCHHDRPublicKey;
 
         /// <summary>
         /// ACI (for limitation of first ACI)
         /// </summary>
-        public AccessControlInfo? ACIForLimitations { get; set; }
+        public AccessControlInfo? ACIForLimitations;
     }
 }

N3DS/NCCHHeader.cs

@@ -1,37 +1,44 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCCH#NCCH_Header"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class NCCHHeader
     {
         /// <summary>
         /// RSA-2048 signature of the NCCH header, using SHA-256.
         /// </summary>
-        public byte[]? RSA2048Signature { get; set; }
+        /// <remarks>0x100 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x100)]
+        public byte[]? RSA2048Signature;
 
         /// <summary>
         /// Magic ID, always 'NCCH'
         /// </summary>
-        public string? MagicID { get; set; }
+        /// <remarks>4 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? MagicID;
 
         /// <summary>
         /// Content size, in media units (1 media unit = 0x200 bytes)
         /// </summary>
-        public uint ContentSizeInMediaUnits { get; set; }
+        public uint ContentSizeInMediaUnits;
 
         /// <summary>
         /// Partition ID
         /// </summary>
-        public ulong PartitionId { get; set; }
+        public ulong PartitionId;
 
         /// <summary>
         /// Maker code
         /// </summary>
-        public ushort MakerCode { get; set; }
+        public ushort MakerCode;
 
         /// <summary>
         /// Version
         /// </summary>
-        public ushort Version { get; set; }
+        public ushort Version;
 
         /// <summary>
         /// When ncchflag[7] = 0x20 starting with FIRM 9.6.0-X, this is compared with the first output u32 from a
@@ -39,118 +46,132 @@
         /// [programID from NCCH + 0x118]. This hash is only used for verification of the content lock seed, and
         /// is not the actual keyY.
         /// </summary>
-        public uint VerificationHash { get; set; }
+        public uint VerificationHash;
 
         /// <summary>
         /// Program ID
         /// </summary>
-        public byte[]? ProgramId { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public byte[]? ProgramId;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved1 { get; set; }
+        /// <remarks>0x10 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x10)]
+        public byte[]? Reserved1;
 
         /// <summary>
         /// Logo Region SHA-256 hash. (For applications built with SDK 5+) (Supported from firmware: 5.0.0-11)
         /// </summary>
-        public byte[]? LogoRegionHash { get; set; }
+        /// <remarks>0x20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x20)]
+        public byte[]? LogoRegionHash;
 
         /// <summary>
         /// Product code
         /// </summary>
-        public string? ProductCode { get; set; }
+        /// <remarks>0x10 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x10)]
+        public string? ProductCode;
 
         /// <summary>
         /// Extended header SHA-256 hash (SHA256 of 2x Alignment Size, beginning at 0x0 of ExHeader)
         /// </summary>
-        public byte[]? ExtendedHeaderHash { get; set; }
+        /// <remarks>0x20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x20)]
+        public byte[]? ExtendedHeaderHash;
 
         /// <summary>
         /// Extended header size, in bytes
         /// </summary>
-        public uint ExtendedHeaderSizeInBytes { get; set; }
+        public uint ExtendedHeaderSizeInBytes;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved2 { get; set; }
+        public uint Reserved2;
 
         /// <summary>
         /// Flags
         /// </summary>
-        public NCCHHeaderFlags? Flags { get; set; }
+        public NCCHHeaderFlags? Flags;
 
         /// <summary>
         /// Plain region offset, in media units
         /// </summary>
-        public uint PlainRegionOffsetInMediaUnits { get; set; }
+        public uint PlainRegionOffsetInMediaUnits;
 
         /// <summary>
         /// Plain region size, in media units
         /// </summary>
-        public uint PlainRegionSizeInMediaUnits { get; set; }
+        public uint PlainRegionSizeInMediaUnits;
 
         /// <summary>
         /// Logo Region offset, in media units (For applications built with SDK 5+) (Supported from firmware: 5.0.0-11)
         /// </summary>
-        public uint LogoRegionOffsetInMediaUnits { get; set; }
+        public uint LogoRegionOffsetInMediaUnits;
 
         /// <summary>
         /// Logo Region size, in media units (For applications built with SDK 5+) (Supported from firmware: 5.0.0-11)
         /// </summary>
-        public uint LogoRegionSizeInMediaUnits { get; set; }
+        public uint LogoRegionSizeInMediaUnits;
 
         /// <summary>
         /// ExeFS offset, in media units
         /// </summary>
-        public uint ExeFSOffsetInMediaUnits { get; set; }
+        public uint ExeFSOffsetInMediaUnits;
 
         /// <summary>
         /// ExeFS size, in media units
         /// </summary>
-        public uint ExeFSSizeInMediaUnits { get; set; }
+        public uint ExeFSSizeInMediaUnits;
 
         /// <summary>
         /// ExeFS hash region size, in media units
         /// </summary>
-        public uint ExeFSHashRegionSizeInMediaUnits { get; set; }
+        public uint ExeFSHashRegionSizeInMediaUnits;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved3 { get; set; }
+        public uint Reserved3;
 
         /// <summary>
         /// RomFS offset, in media units
         /// </summary>
-        public uint RomFSOffsetInMediaUnits { get; set; }
+        public uint RomFSOffsetInMediaUnits;
 
         /// <summary>
         /// RomFS size, in media units
         /// </summary>
-        public uint RomFSSizeInMediaUnits { get; set; }
+        public uint RomFSSizeInMediaUnits;
 
         /// <summary>
         /// RomFS hash region size, in media units
         /// </summary>
-        public uint RomFSHashRegionSizeInMediaUnits { get; set; }
+        public uint RomFSHashRegionSizeInMediaUnits;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved4 { get; set; }
+        public uint Reserved4;
 
         /// <summary>
         /// ExeFS superblock SHA-256 hash - (SHA-256 hash, starting at 0x0 of the ExeFS over the number of
         /// media units specified in the ExeFS hash region size)
         /// </summary>
-        public byte[]? ExeFSSuperblockHash { get; set; }
+        /// <remarks>0x20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x20)]
+        public byte[]? ExeFSSuperblockHash;
 
         /// <summary>
         /// RomFS superblock SHA-256 hash - (SHA-256 hash, starting at 0x0 of the RomFS over the number
         /// of media units specified in the RomFS hash region size)
         /// </summary>
-        public byte[]? RomFSSuperblockHash { get; set; }
+        /// <remarks>0x20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x20)]
+        public byte[]? RomFSSuperblockHash;
     }
 }

N3DS/NCCHHeaderFlags.cs

@@ -1,49 +1,56 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCCH#NCCH_Flags"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class NCCHHeaderFlags
     {
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte Reserved0 { get; set; }
+        public byte Reserved0;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte Reserved1 { get; set; }
+        public byte Reserved1;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte Reserved2 { get; set; }
+        public byte Reserved2;
 
         /// <summary>
         /// Crypto Method: When this is non-zero, a NCCH crypto method using two keyslots is used.
         /// </summary>
-        public CryptoMethod CryptoMethod { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public CryptoMethod CryptoMethod;
 
         /// <summary>
         /// Content Platform: 1 = CTR, 2 = snake (New 3DS).
         /// </summary>
-        public ContentPlatform ContentPlatform { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ContentPlatform ContentPlatform;
 
         /// <summary>
         /// Content Type Bit-masks: Data = 0x1, Executable = 0x2, SystemUpdate = 0x4, Manual = 0x8,
         /// Child = (0x4|0x8), Trial = 0x10. When 'Data' is set, but not 'Executable', NCCH is a CFA.
         /// Otherwise when 'Executable' is set, NCCH is a CXI.
         /// </summary>
-        public ContentType MediaPlatformIndex { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public ContentType MediaPlatformIndex;
 
         /// <summary>
-        /// Content Unit Size i.e. u32 ContentUnitSize = 0x200*2^flags[6] { get; set; }
+        /// Content Unit Size i.e. u32 ContentUnitSize = 0x200*2^flags[6];
         /// </summary>
-        public byte ContentUnitSize { get; set; }
+        public byte ContentUnitSize;
 
         /// <summary>
         /// Bit-masks: FixedCryptoKey = 0x1, NoMountRomFs = 0x2, NoCrypto = 0x4, using a new keyY
         /// generator = 0x20(starting with FIRM 9.6.0-X).
         /// </summary>
-        public BitMasks BitMasks { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public BitMasks BitMasks;
     }
 }

N3DS/PartitionTableEntry.cs

@@ -1,19 +1,22 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <summary>
     /// Offset and Length partition table, in media units
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/NCSD#NCSD_header"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class PartitionTableEntry
     {
         /// <summary>
         /// Offset
         /// </summary>
-        public uint Offset { get; set; }
+        public uint Offset;
 
         /// <summary>
         /// Length
         /// </summary>
-        public uint Length { get; set; }
+        public uint Length;
     }
 }

N3DS/RomFSHeader.cs

@@ -1,4 +1,6 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <summary>
     /// RomFS (or Read-Only Filesystem) is part of the NCCH format, and is
@@ -6,91 +8,94 @@
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/RomFS"/>
     /// TODO: Implement the other parts of the RomFS tree structure
+
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class RomFSHeader
     {
         /// <summary>
         /// Magic "IVFC"
         /// </summary>
-        public string? MagicString { get; set; }
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? MagicString;
 
         /// <summary>
         /// Magic number 0x10000
         /// </summary>
-        public uint MagicNumber { get; set; }
+        public uint MagicNumber;
 
         /// <summary>
         /// Master hash size
         /// </summary>
-        public uint MasterHashSize { get; set; }
+        public uint MasterHashSize;
 
         /// <summary>
         /// Level 1 logical offset
         /// </summary>
-        public ulong Level1LogicalOffset { get; set; }
+        public ulong Level1LogicalOffset;
 
         /// <summary>
         /// Level 1 hashdata size
         /// </summary>
-        public ulong Level1HashdataSize { get; set; }
+        public ulong Level1HashdataSize;
 
         /// <summary>
         /// Level 1 block size, in log2
         /// </summary>
-        public uint Level1BlockSizeLog2 { get; set; }
+        public uint Level1BlockSizeLog2;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved1 { get; set; }
+        public uint Reserved1;
 
         /// <summary>
         /// Level 2 logical offset
         /// </summary>
-        public ulong Level2LogicalOffset { get; set; }
+        public ulong Level2LogicalOffset;
 
         /// <summary>
         /// Level 2 hashdata size
         /// </summary>
-        public ulong Level2HashdataSize { get; set; }
+        public ulong Level2HashdataSize;
 
         /// <summary>
         /// Level 2 block size, in log2
         /// </summary>
-        public uint Level2BlockSizeLog2 { get; set; }
+        public uint Level2BlockSizeLog2;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved2 { get; set; }
+        public uint Reserved2;
 
         /// <summary>
         /// Level 3 logical offset
         /// </summary>
-        public ulong Level3LogicalOffset { get; set; }
+        public ulong Level3LogicalOffset;
 
         /// <summary>
         /// Level 3 hashdata size
         /// </summary>
-        public ulong Level3HashdataSize { get; set; }
+        public ulong Level3HashdataSize;
 
         /// <summary>
         /// Level 3 block size, in log2
         /// </summary>
-        public uint Level3BlockSizeLog2 { get; set; }
+        public uint Level3BlockSizeLog2;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved3 { get; set; }
+        public uint Reserved3;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved4 { get; set; }
+        public uint Reserved4;
 
         /// <summary>
         /// Optional info size.
         /// </summary>
-        public uint OptionalInfoSize { get; set; }
+        public uint OptionalInfoSize;
     }
 }

N3DS/StorageInfo.cs

@@ -1,36 +1,46 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <summary>
     /// Used in FSReg:Register.
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header#Storage_Info"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class StorageInfo
     {
         /// <summary>
         /// Extdata ID
         /// </summary>
-        public ulong ExtdataID { get; set; }
+        public ulong ExtdataID;
 
         /// <summary>
         /// System savedata IDs
         /// </summary>
-        public byte[]? SystemSavedataIDs { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public byte[]? SystemSavedataIDs;
 
         /// <summary>
         /// Storage accessible unique IDs
         /// </summary>
-        public byte[]? StorageAccessibleUniqueIDs { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public byte[]? StorageAccessibleUniqueIDs;
 
         /// <summary>
         /// Filesystem access info
         /// </summary>
         /// TODO: Create enum for the flag values
         /// TODO: Combine with "other attributes"
-        public byte[]? FileSystemAccessInfo { get; set; }
+        /// <remarks>7 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 7)]
+        public byte[]? FileSystemAccessInfo;
 
         /// <summary>
         /// Other attributes
         /// </summary>
-        public StorageInfoOtherAttributes OtherAttributes { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public StorageInfoOtherAttributes OtherAttributes;
     }
 }

N3DS/SystemControlInfo.cs

@@ -1,66 +1,75 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header#System_Control_Info"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class SystemControlInfo
     {
         /// <summary>
         /// Application title (default is "CtrApp")
         /// </summary>
-        public string? ApplicationTitle { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
+        public string? ApplicationTitle;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved1 { get; set; }
+        /// <remarks>5 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
+        public byte[]? Reserved1;
 
         /// <summary>
         /// Flag (bit 0: CompressExefsCode, bit 1: SDApplication)
         /// </summary>
-        public byte Flag { get; set; }
+        public byte Flag;
 
         /// <summary>
         /// Remaster version
         /// </summary>
-        public ushort RemasterVersion { get; set; }
+        public ushort RemasterVersion;
 
         /// <summary>
         /// Text code set info
         /// </summary>
-        public CodeSetInfo? TextCodeSetInfo { get; set; }
+        public CodeSetInfo? TextCodeSetInfo;
 
         /// <summary>
         /// Stack size
         /// </summary>
-        public uint StackSize { get; set; }
+        public uint StackSize;
 
         /// <summary>
         /// Read-only code set info
         /// </summary>
-        public CodeSetInfo? ReadOnlyCodeSetInfo { get; set; }
+        public CodeSetInfo? ReadOnlyCodeSetInfo;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved2 { get; set; }
+        public uint Reserved2;
 
         /// <summary>
         /// Data code set info
         /// </summary>
-        public CodeSetInfo? DataCodeSetInfo { get; set; }
+        public CodeSetInfo? DataCodeSetInfo;
 
         /// <summary>
         /// BSS size
         /// </summary>
-        public uint BSSSize { get; set; }
+        public uint BSSSize;
 
         /// <summary>
         /// Dependency module (program ID) list
         /// </summary>
-        public ulong[]? DependencyModuleList { get; set; }
+        /// <remarks>48 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 48)]
+        public ulong[]? DependencyModuleList;
 
         /// <summary>
         /// SystemInfo
         /// </summary>
-        public SystemInfo? SystemInfo { get; set; }
+        public SystemInfo? SystemInfo;
     }
 }

N3DS/SystemInfo.cs

@@ -1,21 +1,26 @@
-namespace SabreTools.Models.N3DS
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.N3DS
 {
     /// <see href="https://www.3dbrew.org/wiki/NCCH/Extended_Header#System_Info"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class SystemInfo
     {
         /// <summary>
         /// SaveData Size
         /// </summary>
-        public ulong SaveDataSize { get; set; }
+        public ulong SaveDataSize;
 
         /// <summary>
         /// Jump ID
         /// </summary>
-        public ulong JumpID { get; set; }
+        public ulong JumpID;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved { get; set; }
+        /// <remarks>0x30 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x30)]
+        public byte[]? Reserved;
     }
 }

N3DS/TestData.cs

@@ -1,59 +1,80 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.N3DS
 {
     /// <summary>
     /// The test data is the same one encountered in development DS/DSi cartridges.
     /// </summary>
     /// <see href="https://www.3dbrew.org/wiki/NCSD#TestData"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class TestData
     {
         /// <summary>
         /// The bytes FF 00 FF 00 AA 55 AA 55.
         /// </summary>
-        public byte[]? Signature { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public byte[]? Signature;
 
         /// <summary>
         /// An ascending byte sequence equal to the offset mod 256 (08 09 0A ... FE FF 00 01 ... FF).
         /// </summary>
-        public byte[]? AscendingByteSequence { get; set; }
+        /// <remarks>0x1F8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x1F8)]
+        public byte[]? AscendingByteSequence;
 
         /// <summary>
         /// A descending byte sequence equal to 255 minus the offset mod 256 (FF FE FD ... 00 FF DE ... 00).
         /// </summary>
-        public byte[]? DescendingByteSequence { get; set; }
+        /// <remarks>0x200 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x200)]
+        public byte[]? DescendingByteSequence;
 
         /// <summary>
         /// Filled with 00 (0b00000000) bytes.
         /// </summary>
-        public byte[]? Filled00 { get; set; }
+        /// <remarks>0x200 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x200)]
+        public byte[]? Filled00;
 
         /// <summary>
         /// Filled with FF (0b11111111) bytes.
         /// </summary>
-        public byte[]? FilledFF { get; set; }
+        /// <remarks>0x200 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x200)]
+        public byte[]? FilledFF;
 
         /// <summary>
         /// Filled with 0F (0b00001111) bytes.
         /// </summary>
-        public byte[]? Filled0F { get; set; }
+        /// <remarks>0x200 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x200)]
+        public byte[]? Filled0F;
 
         /// <summary>
         /// Filled with F0 (0b11110000) bytes.
         /// </summary>
-        public byte[]? FilledF0 { get; set; }
+        /// <remarks>0x200 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x200)]
+        public byte[]? FilledF0;
 
         /// <summary>
         /// Filled with 55 (0b01010101) bytes.
         /// </summary>
-        public byte[]? Filled55 { get; set; }
+        /// <remarks>0x200 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x200)]
+        public byte[]? Filled55;
 
         /// <summary>
         /// Filled with AA (0b10101010) bytes.
         /// </summary>
-        public byte[]? FilledAA { get; set; }
+        /// <remarks>0x1FF bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x1FF)]
+        public byte[]? FilledAA;
 
         /// <summary>
         /// The final byte is 00 (0b00000000).
         /// </summary>
-        public byte FinalByte { get; set; }
+        public byte FinalByte;
     }
 }

NCF/DirectoryEntry.cs

@@ -1,46 +1,45 @@
+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 DirectoryEntry
     {
         /// <summary>
         /// Offset to the directory item name from the end of the directory items.
         /// </summary>
-        public uint NameOffset { get; set; }
-
-        /// <summary>
-        /// Directory item name from the end of the directory items.
-        /// </summary>
-        public string? Name { get; set; }
+        public uint NameOffset;
 
         /// <summary>
         /// Size of the item.  (If file, file size.  If folder, num items.)
         /// </summary>
-        public uint ItemSize { get; set; }
+        public uint ItemSize;
 
         /// <summary>
         /// Checksome index. (0xFFFFFFFF == None).
         /// </summary>
-        public uint ChecksumIndex { get; set; }
+        public uint ChecksumIndex;
 
         /// <summary>
         /// Flags for the directory item.  (0x00000000 == Folder).
         /// </summary>
-        public HL_NCF_FLAG DirectoryFlags { get; set; }
+        [MarshalAs(UnmanagedType.U4)]
+        public HL_NCF_FLAG DirectoryFlags;
 
         /// <summary>
         /// Index of the parent directory item.  (0xFFFFFFFF == None).
         /// </summary>
-        public uint ParentIndex { get; set; }
+        public uint ParentIndex;
 
         /// <summary>
         /// Index of the next directory item.  (0x00000000 == None).
         /// </summary>
-        public uint NextIndex { get; set; }
+        public uint NextIndex;
 
         /// <summary>
         /// Index of the first directory item.  (0x00000000 == None).
         /// </summary>
-        public uint FirstIndex { get; set; }
+        public uint FirstIndex;
     }
 }

NewExecutable/Executable.cs

@@ -26,7 +26,7 @@ namespace SabreTools.Models.NewExecutable
         /// <summary>
         /// Segment table
         /// </summary>
-        public SegmentTableEntry?[]? SegmentTable { get; set; }
+        public SegmentTableEntry[]? SegmentTable { get; set; }
 
         /// <summary>
         /// Resource table
@@ -36,26 +36,26 @@ namespace SabreTools.Models.NewExecutable
         /// <summary>
         /// Resident-Name table
         /// </summary>
-        public ResidentNameTableEntry?[]? ResidentNameTable { get; set; }
+        public ResidentNameTableEntry[]? ResidentNameTable { get; set; }
 
         /// <summary>
         /// Module-Reference table
         /// </summary>
-        public ModuleReferenceTableEntry?[]? ModuleReferenceTable { get; set; }
+        public ModuleReferenceTableEntry[]? ModuleReferenceTable { get; set; }
 
         /// <summary>
         /// Imported-Name table
         /// </summary>
-        public Dictionary<ushort, ImportedNameTableEntry?>? ImportedNameTable { get; set; }
+        public Dictionary<ushort, ImportedNameTableEntry>? ImportedNameTable { get; set; }
 
         /// <summary>
         /// Entry table
         /// </summary>
-        public EntryTableBundle?[]? EntryTable { get; set; }
+        public EntryTableBundle[]? EntryTable { get; set; }
 
         /// <summary>
         /// Nonresident-Name table
         /// </summary>
-        public NonResidentNameTableEntry?[]? NonResidentNameTable { get; set; }
+        public NonResidentNameTableEntry[]? NonResidentNameTable { get; set; }
     }
 }

NewExecutable/ImportedNameTableEntry.cs

@@ -15,7 +15,7 @@
         /// Length of the name string that follows. A zero value indicates
         /// the end of the name table.
         /// </summary>
-        public byte Length { get; set; }
+        public byte Length { get; set; } // TODO: Remove in lieu of AnsiBStr
 
         /// <summary>
         /// ASCII text of the name string.

NewExecutable/NonResidentNameTableEntry.cs

@@ -15,7 +15,7 @@
         /// Length of the name string that follows. A zero value indicates
         /// the end of the name table.
         /// </summary>
-        public byte Length { get; set; }
+        public byte Length { get; set; } // TODO: Remove in lieu of AnsiBStr
 
         /// <summary>
         /// ASCII text of the name string.

NewExecutable/ResidentNameTableEntry.cs

@@ -14,7 +14,7 @@
         /// Length of the name string that follows. A zero value indicates
         /// the end of the name table.
         /// </summary>
-        public byte Length { get; set; }
+        public byte Length { get; set; } // TODO: Remove in lieu of AnsiBStr
 
         /// <summary>
         /// ASCII text of the name string.

NewExecutable/ResourceTypeAndNameString.cs

@@ -13,7 +13,7 @@
         /// indicates the end of the resource type and name string, also
         /// the end of the resource table.
         /// </summary>
-        public byte Length { get; set; }
+        public byte Length { get; set; } // TODO: Remove in lieu of AnsiBStr
 
         /// <summary>
         /// ASCII text of the type or name string.

Nitro/CommonHeader.cs

@@ -1,214 +1,232 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.Nitro
 {
     /// <summary>
     /// Nintendo DS / DSi cartridge header
     /// </summary>
     /// <see href="https://dsibrew.org/wiki/DSi_cartridge_header"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class CommonHeader
     {
         /// <summary>
         /// Game Title
         /// </summary>
-        public string? GameTitle { get; set; }
+        /// <remarks>12 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 12)]
+        public string? GameTitle;
 
         /// <summary>
         /// Gamecode
         /// </summary>
-        public uint GameCode { get; set; }
+        public uint GameCode;
 
         /// <summary>
         /// Makercode
         /// </summary>
-        public string? MakerCode { get; set; }
+        /// <remarks>2 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 2)]
+        public string? MakerCode;
 
         /// <summary>
         /// Unitcode
         /// </summary>
-        public Unitcode UnitCode { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public Unitcode UnitCode;
 
         /// <summary>
         /// Encryption seed select (device code. 0 = normal)
         /// </summary>
-        public byte EncryptionSeedSelect { get; set; }
+        public byte EncryptionSeedSelect;
 
         /// <summary>
         /// Devicecapacity
         /// </summary>
-        public byte DeviceCapacity { get; set; }
+        public byte DeviceCapacity;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved1 { get; set; }
+        /// <remarks>7 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 7)]
+        public byte[]? Reserved1;
 
         /// <summary>
         /// Game Revision (used by DSi titles)
         /// </summary>
-        public ushort GameRevision { get; set; }
+        public ushort GameRevision;
 
         /// <summary>
         /// ROM Version
         /// </summary>
-        public byte RomVersion { get; set; }
+        public byte RomVersion;
 
         /// <summary>
         /// Internal flags, (Bit2: Autostart)
         /// </summary>
-        public byte InternalFlags { get; set; }
+        public byte InternalFlags;
 
         /// <summary>
         /// ARM9 rom offset
         /// </summary>
-        public uint ARM9RomOffset { get; set; }
+        public uint ARM9RomOffset;
 
         /// <summary>
         /// ARM9 entry address
         /// </summary>
-        public uint ARM9EntryAddress { get; set; }
+        public uint ARM9EntryAddress;
 
         /// <summary>
         /// ARM9 load address
         /// </summary>
-        public uint ARM9LoadAddress { get; set; }
+        public uint ARM9LoadAddress;
 
         /// <summary>
         /// ARM9 size
         /// </summary>
-        public uint ARM9Size { get; set; }
+        public uint ARM9Size;
 
         /// <summary>
         /// ARM7 rom offset
         /// </summary>
-        public uint ARM7RomOffset { get; set; }
+        public uint ARM7RomOffset;
 
         /// <summary>
         /// ARM7 entry address
         /// </summary>
-        public uint ARM7EntryAddress { get; set; }
+        public uint ARM7EntryAddress;
 
         /// <summary>
         /// ARM7 load address
         /// </summary>
-        public uint ARM7LoadAddress { get; set; }
+        public uint ARM7LoadAddress;
 
         /// <summary>
         /// ARM7 size
         /// </summary>
-        public uint ARM7Size { get; set; }
+        public uint ARM7Size;
 
         /// <summary>
         /// File Name Table (FNT) offset
         /// </summary>
-        public uint FileNameTableOffset { get; set; }
+        public uint FileNameTableOffset;
 
         /// <summary>
         /// File Name Table (FNT) length
         /// </summary>
-        public uint FileNameTableLength { get; set; }
+        public uint FileNameTableLength;
 
         /// <summary>
         /// File Allocation Table (FNT) offset
         /// </summary>
-        public uint FileAllocationTableOffset { get; set; }
+        public uint FileAllocationTableOffset;
 
         /// <summary>
         /// File Allocation Table (FNT) length
         /// </summary>
-        public uint FileAllocationTableLength { get; set; }
+        public uint FileAllocationTableLength;
 
         /// <summary>
         /// File Name Table (FNT) offset
         /// </summary>
-        public uint ARM9OverlayOffset { get; set; }
+        public uint ARM9OverlayOffset;
 
         /// <summary>
         /// File Name Table (FNT) length
         /// </summary>
-        public uint ARM9OverlayLength { get; set; }
+        public uint ARM9OverlayLength;
 
         /// <summary>
         /// File Name Table (FNT) offset
         /// </summary>
-        public uint ARM7OverlayOffset { get; set; }
+        public uint ARM7OverlayOffset;
 
         /// <summary>
         /// File Name Table (FNT) length
         /// </summary>
-        public uint ARM7OverlayLength { get; set; }
+        public uint ARM7OverlayLength;
 
         /// <summary>
         /// Normal card control register settings (0x00416657 for OneTimePROM)
         /// </summary>
-        public uint NormalCardControlRegisterSettings { get; set; }
+        public uint NormalCardControlRegisterSettings;
 
         /// <summary>
         /// Secure card control register settings (0x081808F8 for OneTimePROM)
         /// </summary>
-        public uint SecureCardControlRegisterSettings { get; set; }
+        public uint SecureCardControlRegisterSettings;
 
         /// <summary>
         /// Icon Banner offset (NDSi same as NDS, but with new extra entries)
         /// </summary>
-        public uint IconBannerOffset { get; set; }
+        public uint IconBannerOffset;
 
         /// <summary>
         /// Secure area (2K) CRC
         /// </summary>
-        public ushort SecureAreaCRC { get; set; }
+        public ushort SecureAreaCRC;
 
         /// <summary>
         /// Secure transfer timeout (0x0D7E for OneTimePROM)
         /// </summary>
-        public ushort SecureTransferTimeout { get; set; }
+        public ushort SecureTransferTimeout;
 
         /// <summary>
         /// ARM9 autoload
         /// </summary>
-        public uint ARM9Autoload { get; set; }
+        public uint ARM9Autoload;
 
         /// <summary>
         /// ARM7 autoload
         /// </summary>
-        public uint ARM7Autoload { get; set; }
+        public uint ARM7Autoload;
 
         /// <summary>
         /// Secure disable
         /// </summary>
-        public byte[]? SecureDisable { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public byte[]? SecureDisable;
 
         /// <summary>
         /// NTR region ROM size (excluding DSi area)
         /// </summary>
-        public uint NTRRegionRomSize { get; set; }
+        public uint NTRRegionRomSize;
 
         /// <summary>
         /// Header size
         /// </summary>
-        public uint HeaderSize { get; set; }
+        public uint HeaderSize;
 
         /// <summary>
-        ///Reserved (0x88, 0x8C, 0x90 = Unknown, used by DSi)
+        /// Reserved (0x88, 0x8C, 0x90 = Unknown, used by DSi)
         /// </summary>
-        public byte[]? Reserved2 { get; set; }
+        /// <remarks>56 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 56)]
+        public byte[]? Reserved2;
 
         /// <summary>
         /// Nintendo Logo
         /// </summary>
-        public byte[]? NintendoLogo { get; set; }
+        /// <remarks>156 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 156)]
+        public byte[]? NintendoLogo;
 
         /// <summary>
         /// Nintendo Logo CRC
         /// </summary>
-        public ushort NintendoLogoCRC { get; set; }
+        public ushort NintendoLogoCRC;
 
         /// <summary>
         /// Header CRC
         /// </summary>
-        public ushort HeaderCRC { get; set; }
+        public ushort HeaderCRC;
 
         /// <summary>
         /// Debugger reserved
         /// </summary>
-        public byte[]? DebuggerReserved { get; set; }
+        /// <remarks>0x20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x20)]
+        public byte[]? DebuggerReserved;
     }
 }

Nitro/ExtendedDSiHeader.cs

@@ -1,259 +1,298 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.Nitro
 {
     /// <summary>
     /// Nintendo DSi extended cart header
     /// </summary>
     /// <see href="https://dsibrew.org/wiki/DSi_cartridge_header"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ExtendedDSiHeader
     {
         /// <summary>
         /// Global MBK1..MBK5 Settings
         /// </summary>
-        public uint[]? GlobalMBK15Settings { get; set; }
+        /// <remarks>5 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 5)]
+        public uint[]? GlobalMBK15Settings;
 
         /// <summary>
         ///	Local MBK6..MBK8 Settings for ARM9
         /// </summary>
-        public uint[]? LocalMBK68SettingsARM9 { get; set; }
+        /// <remarks>3 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+        public uint[]? LocalMBK68SettingsARM9;
 
         /// <summary>
         /// Local MBK6..MBK8 Settings for ARM7
         /// </summary>
-        public uint[]? LocalMBK68SettingsARM7 { get; set; }
+        /// <remarks>3 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 3)]
+        public uint[]? LocalMBK68SettingsARM7;
 
         /// <summary>
         /// Global MBK9 Setting
         /// </summary>
-        public uint GlobalMBK9Setting { get; set; }
+        public uint GlobalMBK9Setting;
 
         /// <summary>
         /// Region Flags
         /// </summary>
-        public uint RegionFlags { get; set; }
+        public uint RegionFlags;
 
         /// <summary>
         /// Access control
         /// </summary>
-        public uint AccessControl { get; set; }
+        public uint AccessControl;
 
         /// <summary>
         /// ARM7 SCFG EXT mask (controls which devices to enable)
         /// </summary>
-        public uint ARM7SCFGEXTMask { get; set; }
+        public uint ARM7SCFGEXTMask;
 
         /// <summary>
         /// Reserved/flags? When bit2 of byte 0x1bf is set, usage of banner.sav from the title data dir is enabled.(additional banner data)
         /// </summary>
-        public uint ReservedFlags { get; set; }
+        public uint ReservedFlags;
 
         /// <summary>
         /// ARM9i rom offset
         /// </summary>
-        public uint ARM9iRomOffset { get; set; }
+        public uint ARM9iRomOffset;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public uint Reserved3 { get; set; }
+        public uint Reserved3;
 
         /// <summary>
         /// ARM9i load address
         /// </summary>
-        public uint ARM9iLoadAddress { get; set; }
+        public uint ARM9iLoadAddress;
 
         /// <summary>
-        /// ARM9i size { get; set; }
+        /// ARM9i size;
         /// </summary>
-        public uint ARM9iSize { get; set; }
+        public uint ARM9iSize;
 
         /// <summary>
         /// ARM7i rom offset
         /// </summary>
-        public uint ARM7iRomOffset { get; set; }
+        public uint ARM7iRomOffset;
 
         /// <summary>
         /// Pointer to base address where various structures and parameters are passed to the title - what is that???
         /// </summary>
-        public uint Reserved4 { get; set; }
+        public uint Reserved4;
 
         /// <summary>
         /// ARM7i load address
         /// </summary>
-        public uint ARM7iLoadAddress { get; set; }
+        public uint ARM7iLoadAddress;
 
         /// <summary>
-        /// ARM7i size { get; set; }
+        /// ARM7i size;
         /// </summary>
-        public uint ARM7iSize { get; set; }
+        public uint ARM7iSize;
 
         /// <summary>
         /// Digest NTR region offset
         /// </summary>
-        public uint DigestNTRRegionOffset { get; set; }
+        public uint DigestNTRRegionOffset;
 
         /// <summary>
         /// Digest NTR region length
         /// </summary>
-        public uint DigestNTRRegionLength { get; set; }
+        public uint DigestNTRRegionLength;
 
         // <summary>
         /// Digest TWL region offset
         /// </summary>
-        public uint DigestTWLRegionOffset { get; set; }
+        public uint DigestTWLRegionOffset;
 
         /// <summary>
         /// Digest TWL region length
         /// </summary>
-        public uint DigestTWLRegionLength { get; set; }
+        public uint DigestTWLRegionLength;
 
         // <summary>
         /// Digest Sector Hashtable region offset
         /// </summary>
-        public uint DigestSectorHashtableRegionOffset { get; set; }
+        public uint DigestSectorHashtableRegionOffset;
 
         /// <summary>
         /// Digest Sector Hashtable region length
         /// </summary>
-        public uint DigestSectorHashtableRegionLength { get; set; }
+        public uint DigestSectorHashtableRegionLength;
 
         // <summary>
         /// Digest Block Hashtable region offset
         /// </summary>
-        public uint DigestBlockHashtableRegionOffset { get; set; }
+        public uint DigestBlockHashtableRegionOffset;
 
         /// <summary>
         /// Digest Block Hashtable region length
         /// </summary>
-        public uint DigestBlockHashtableRegionLength { get; set; }
+        public uint DigestBlockHashtableRegionLength;
 
         /// <summary>
         /// Digest Sector size
         /// </summary>
-        public uint DigestSectorSize { get; set; }
+        public uint DigestSectorSize;
 
         /// <summary>
         /// Digeset Block Sectorount
         /// </summary>
-        public uint DigestBlockSectorCount { get; set; }
+        public uint DigestBlockSectorCount;
 
         /// <summary>
         /// Icon Banner Size (usually 0x23C0)
         /// </summary>
-        public uint IconBannerSize { get; set; }
+        public uint IconBannerSize;
 
         /// <summary>
         /// Unknown (used by DSi)
         /// </summary>
-        public uint Unknown1 { get; set; }
+        public uint Unknown1;
 
         /// <summary>
         /// NTR+TWL region ROM size (total size including DSi area)
         /// </summary>
-        public uint NTRTWLRegionRomSize { get; set; }
+        public uint NTRTWLRegionRomSize;
 
         /// <summary>
         /// Unknown (used by DSi)
         /// </summary>
-        public byte[]? Unknown2 { get; set; }
+        /// <remarks>12 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)]
+        public byte[]? Unknown2;
 
         /// <summary>
         /// Modcrypt area 1 offset
         /// </summary>
-        public uint ModcryptArea1Offset { get; set; }
+        public uint ModcryptArea1Offset;
 
         /// <summary>
         /// Modcrypt area 1 size
         /// </summary>
-        public uint ModcryptArea1Size { get; set; }
+        public uint ModcryptArea1Size;
 
         /// <summary>
         /// Modcrypt area 2 offset
         /// </summary>
-        public uint ModcryptArea2Offset { get; set; }
+        public uint ModcryptArea2Offset;
 
         /// <summary>
         /// Modcrypt area 2 size
         /// </summary>
-        public uint ModcryptArea2Size { get; set; }
+        public uint ModcryptArea2Size;
 
         /// <summary>
         /// Title ID
         /// </summary>
-        public byte[]? TitleID { get; set; }
+        /// <remarks>8 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public byte[]? TitleID;
 
         /// <summary>
         /// DSiWare: "public.sav" size
         /// </summary>
-        public uint DSiWarePublicSavSize { get; set; }
+        public uint DSiWarePublicSavSize;
 
         /// <summary>
         /// DSiWare: "private.sav" size
         /// </summary>
-        public uint DSiWarePrivateSavSize { get; set; }
+        public uint DSiWarePrivateSavSize;
 
         /// <summary>
         /// Reserved (zero)
         /// </summary>
-        public byte[]? ReservedZero { get; set; }
+        /// <remarks>176 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 176)]
+        public byte[]? ReservedZero;
 
         /// <summary>
         /// Unknown (used by DSi)
         /// </summary>
-        public byte[]? Unknown3 { get; set; }
+        /// <remarks>16 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+        public byte[]? Unknown3;
 
         /// <summary>
         /// ARM9 (with encrypted secure area) SHA1 HMAC hash
         /// </summary>
-        public byte[]? ARM9WithSecureAreaSHA1HMACHash { get; set; }
+        /// <remarks>20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
+        public byte[]? ARM9WithSecureAreaSHA1HMACHash;
 
         /// <summary>
         /// ARM7 SHA1 HMAC hash
         /// </summary>
-        public byte[]? ARM7SHA1HMACHash { get; set; }
+        /// <remarks>20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
+        public byte[]? ARM7SHA1HMACHash;
 
         /// <summary>
         /// Digest master SHA1 HMAC hash
         /// </summary>
-        public byte[]? DigestMasterSHA1HMACHash { get; set; }
+        /// <remarks>20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
+        public byte[]? DigestMasterSHA1HMACHash;
 
         /// <summary>
         /// Banner SHA1 HMAC hash
         /// </summary>
-        public byte[]? BannerSHA1HMACHash { get; set; }
+        /// <remarks>20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
+        public byte[]? BannerSHA1HMACHash;
 
         /// <summary>
         /// ARM9i (decrypted) SHA1 HMAC hash
         /// </summary>
-        public byte[]? ARM9iDecryptedSHA1HMACHash { get; set; }
+        /// <remarks>20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
+        public byte[]? ARM9iDecryptedSHA1HMACHash;
 
         /// <summary>
         /// ARM7i (decrypted) SHA1 HMAC hash
         /// </summary>
-        public byte[]? ARM7iDecryptedSHA1HMACHash { get; set; }
+        /// <remarks>20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
+        public byte[]? ARM7iDecryptedSHA1HMACHash;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved5 { get; set; }
+        /// <remarks>40 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 40)]
+        public byte[]? Reserved5;
 
         /// <summary>
         /// ARM9 (without secure area) SHA1 HMAC hash
         /// </summary>
-        public byte[]? ARM9NoSecureAreaSHA1HMACHash { get; set; }
+        /// <remarks>20 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 20)]
+        public byte[]? ARM9NoSecureAreaSHA1HMACHash;
 
         /// <summary>
         /// Reserved
         /// </summary>
-        public byte[]? Reserved6 { get; set; }
+        /// <remarks>2636 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 2636)]
+        public byte[]? Reserved6;
 
         /// <summary>
         /// Reserved and unchecked region, always zero. Used for passing arguments in debug environment.
         /// </summary>
-        public byte[]? ReservedAndUnchecked { get; set; }
+        /// <remarks>0x180 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x180)]
+        public byte[]? ReservedAndUnchecked;
 
         /// <summary>
         /// RSA signature (the first 0xE00 bytes of the header are signed with an 1024-bit RSA signature).
         /// </summary>
-        public byte[]? RSASignature { get; set; }
+        /// <remarks>0x80 bytes</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 0x80)]
+        public byte[]? RSASignature;
     }
 }

Nitro/FileAllocationTableEntry.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.Nitro
 {
     /// <summary>
@@ -5,16 +7,17 @@ namespace SabreTools.Models.Nitro
     /// it's just a table of 8 byte entries
     /// </summary>
     /// <see href="https://github.com/Deijin27/RanseiLink/wiki/NDS-File-System"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class FileAllocationTableEntry
     {
         /// <summary>
         /// Start offset of file
         /// </summary>
-        public uint StartOffset { get; set; }
+        public uint StartOffset;
 
         /// <summary>
         /// End offset of file (after this is padding)
         /// </summary>
-        public uint EndOffset { get; set; }
+        public uint EndOffset;
     }
 }

Nitro/FolderAllocationTableEntry.cs

@@ -1,3 +1,5 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.Nitro
 {
     /// <summary>
@@ -6,28 +8,29 @@ namespace SabreTools.Models.Nitro
     /// point to the file system.
     /// </summary>
     /// <see href="https://github.com/Deijin27/RanseiLink/wiki/NDS-File-System"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class FolderAllocationTableEntry
     {
         /// <summary>
         /// Start offset of folder contents within Name List
         /// relative to start of NameTable
         /// </summary>
-        public uint StartOffset { get; set; }
+        public uint StartOffset;
 
         /// <summary>
         /// Index of first file within folder in File Allocation Table
         /// </summary>
-        public ushort FirstFileIndex { get; set; }
+        public ushort FirstFileIndex;
 
         /// <summary>
         /// Index of parent folder in current table; for root folder
         /// this holds the number of entries in the table
         /// </summary>
-        public byte ParentFolderIndex { get; set; }
+        public byte ParentFolderIndex;
 
         /// <summary>
         /// Unknown, always 0xF0 except for root folder
         /// </summary>
-        public byte Unknown { get; set; }
+        public byte Unknown;
     }
 }

PKZIP/AS400ExtraFieldAttribute.cs

@@ -0,0 +1,26 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// AS/400 Extra Field (0x0065) Attribute [APPENDIX A]
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class AS400ExtraFieldAttribute : ExtensibleDataField
+    {
+        /// <summary>
+        /// Field length including length
+        /// </summary>
+        /// <remarks>Big-endian</remarks>
+        public ushort FieldLength { get; set; }
+
+        /// <summary>
+        /// Field code
+        /// </summary>
+        public AS400ExtraFieldAttributeFieldCode FieldCode { get; set; }
+
+        /// <summary>
+        /// Data
+        /// </summary>
+        /// <remarks>Variable byte length based on field code</remarks>
+        public byte[]? Data { get; set; }
+    }
+}

PKZIP/DataStreamAlignment.cs

@@ -0,0 +1,34 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// (per Zbynek Vyskovsky) Defines alignment of data stream of this
+    /// entry within the zip archive.  Additionally, indicates whether the
+    /// compression method should be kept when re-compressing the zip file.
+    /// 
+    /// The purpose of this extra field is to align specific resources to
+    /// word or page boundaries so they can be easily mapped into memory.
+    /// 
+    /// The alignment field (lower 15 bits) defines the minimal alignment
+    /// required by the data stream.   Bit 15 of alignment field indicates
+    /// whether the compression method of this entry can be changed when
+    /// recompressing the zip file.  The value 0 means the compression method
+    /// should not be changed.  The value 1 indicates  the compression method
+    /// may be changed. The padding field contains padding to ensure the correct
+    /// alignment.  It can be changed at any time when the offset or required
+    /// alignment changes. (see https://issues.apache.org/jira/browse/COMPRESS-391)
+    /// </summary>
+    /// <remarks>Header ID = 0xa11e</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class DataStreamAlignment : ExtensibleDataField
+    {
+        /// <summary>
+        /// Required alignment and indicator
+        /// </summary>
+        public ushort Alignment { get; set; }
+
+        /// <summary>
+        /// 0x00-padding
+        /// </summary>
+        public byte[]? Padding { get; set; }
+    }
+}

PKZIP/ExtensibleDataField.cs

@@ -0,0 +1,22 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// In order to allow different programs and different types
+    /// of information to be stored in the 'extra' field in .ZIP
+    /// files, the following structure MUST be used for all
+    /// programs storing data in this field
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public abstract class ExtensibleDataField
+    {
+        /// <summary>
+        /// Header ID
+        /// </summary>
+        public HeaderID HeaderID { get; set; }
+
+        /// <summary>
+        /// Data Size
+        /// </summary>
+        public ushort DataSize { get; set; }
+    }
+}

PKZIP/FWKCSMD5ExtraField.cs

@@ -0,0 +1,39 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The FWKCS Contents_Signature System, used in
+    /// automatically identifying files independent of file name,
+    /// optionally adds and uses an extra field to support the
+    /// rapid creation of an enhanced contents_signature.
+    /// 
+    /// When FWKCS revises a .ZIP file central directory to add
+    /// this extra field for a file, it also replaces the
+    /// central directory entry for that file's uncompressed
+    /// file length with a measured value.
+    /// 
+    /// FWKCS provides an option to strip this extra field, if
+    /// present, from a .ZIP file central directory. In adding
+    /// this extra field, FWKCS preserves .ZIP file Authenticity
+    /// Verification; if stripping this extra field, FWKCS
+    /// preserves all versions of AV through PKZIP version 2.04g.
+    /// 
+    /// FWKCS, and FWKCS Contents_Signature System, are
+    /// trademarks of Frederick W. Kantor.
+    /// </summary>
+    /// <remarks>Header ID = 0x4b46</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class FWKCSMD5ExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// "MD5"
+        /// </summary>
+        /// <remarks>3 bytes</remarks>
+        public byte[]? Preface { get; set; }
+
+        /// <summary>
+        /// Uncompressed file's MD5 hash, low byte first
+        /// </summary>
+        /// <remarks>16 bytes</remarks>
+        public byte[]? MD5 { get; set; }
+    }
+}

PKZIP/InfoZIPUnicodeCommentExtraField.cs

@@ -0,0 +1,54 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Stores the UTF-8 version of the file comment as stored in the
+    /// central directory header. (Last Revision 20070912)
+    /// 
+    /// Currently Version is set to the number 1.  If there is a need
+    /// to change this field, the version will be incremented.  Changes
+    /// MAY NOT be backward compatible so this extra field SHOULD NOT be
+    /// used if the version is not recognized.
+    /// 
+    /// The ComCRC32 is the standard zip CRC32 checksum of the File Comment
+    /// field in the central directory header.  This is used to verify that
+    /// the comment field has not changed since the Unicode Comment extra field
+    /// was created.  This can happen if a utility changes the File Comment 
+    /// field but does not update the UTF-8 Comment extra field.  If the CRC 
+    /// check fails, this Unicode Comment extra field SHOULD be ignored and 
+    /// the File Comment field in the header SHOULD be used instead.
+    /// 
+    /// The UnicodeCom field is the UTF-8 version of the File Comment field
+    /// in the header.  As UnicodeCom is defined to be UTF-8, no UTF-8 byte
+    /// order mark (BOM) is used.  The length of this field is determined by
+    /// subtracting the size of the previous fields from TSize.  If both the
+    /// File Name and Comment fields are UTF-8, the new General Purpose Bit
+    /// Flag, bit 11 (Language encoding flag (EFS)), can be used to indicate
+    /// both the header File Name and Comment fields are UTF-8 and, in this
+    /// case, the Unicode Path and Unicode Comment extra fields are not
+    /// needed and SHOULD NOT be created.  Note that, for backward
+    /// compatibility, bit 11 SHOULD only be used if the native character set
+    /// of the paths and comments being zipped up are already in UTF-8. It is
+    /// expected that the same file comment storage method, either general
+    /// purpose bit 11 or extra fields, be used in both the Local and Central
+    /// Directory Header for a file.
+    /// </summary>
+    /// <remarks>Header ID = 0x6375</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class InfoZIPUnicodeCommentExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Version of this extra field, currently 1
+        /// </summary>
+        public byte Version { get; set; }
+
+        /// <summary>
+        /// Comment Field CRC32 Checksum
+        /// </summary>
+        public uint ComCRC32 { get; set; }
+
+        /// <summary>
+        /// UTF-8 version of the entry comment
+        /// </summary>
+        public string? UnicodeCom { get; set; }
+    }
+}

PKZIP/InfoZIPUnicodePathExtraField.cs

@@ -0,0 +1,54 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// Stores the UTF-8 version of the file name field as stored in the
+    /// local header and central directory header. (Last Revision 20070912)
+    /// 
+    /// Currently Version is set to the number 1.  If there is a need
+    /// to change this field, the version will be incremented.  Changes
+    /// MAY NOT be backward compatible so this extra field SHOULD NOT be
+    /// used if the version is not recognized.
+    /// 
+    /// The NameCRC32 is the standard zip CRC32 checksum of the File Name
+    /// field in the header.  This is used to verify that the header
+    /// File Name field has not changed since the Unicode Path extra field
+    /// was created.  This can happen if a utility renames the File Name but
+    /// does not update the UTF-8 path extra field.  If the CRC check fails,
+    /// this UTF-8 Path Extra Field SHOULD be ignored and the File Name field
+    /// in the header SHOULD be used instead.
+    /// 
+    /// The UnicodeName is the UTF-8 version of the contents of the File Name
+    /// field in the header.  As UnicodeName is defined to be UTF-8, no UTF-8
+    /// byte order mark (BOM) is used.  The length of this field is determined
+    /// by subtracting the size of the previous fields from TSize.  If both
+    /// the File Name and Comment fields are UTF-8, the new General Purpose
+    /// Bit Flag, bit 11 (Language encoding flag (EFS)), can be used to
+    /// indicate that both the header File Name and Comment fields are UTF-8
+    /// and, in this case, the Unicode Path and Unicode Comment extra fields
+    /// are not needed and SHOULD NOT be created.  Note that, for backward
+    /// compatibility, bit 11 SHOULD only be used if the native character set
+    /// of the paths and comments being zipped up are already in UTF-8. It is
+    /// expected that the same file name storage method, either general
+    /// purpose bit 11 or extra fields, be used in both the Local and Central
+    /// Directory Header for a file.
+    /// </summary>
+    /// <remarks>Header ID = 0x7075</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class InfoZIPUnicodePathExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Version of this extra field, currently 1
+        /// </summary>
+        public byte Version { get; set; }
+
+        /// <summary>
+        /// File Name Field CRC32 Checksum
+        /// </summary>
+        public uint NameCRC32 { get; set; }
+
+        /// <summary>
+        /// UTF-8 version of the entry File Name
+        /// </summary>
+        public string? UnicodeName { get; set; }
+    }
+}

PKZIP/KeyProviderRecordExtraField.cs

@@ -0,0 +1,22 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the Key Provider "extra" block.
+    /// TData is a variable length, variable content field.  It holds
+    /// information about encryptions and/or encryption key sources.
+    /// Contact PKWARE for information on current TData structures.
+    /// Information in this "extra" block may aternatively be placed
+    /// within comment fields.  Refer to the section in this document
+    /// entitled "Incorporating PKWARE Proprietary Technology into Your
+    /// Product" for more information.
+    /// </summary>
+    /// <remarks>Header ID = 0x0022</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class KeyProviderRecordExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Data about the key
+        /// </summary>
+        public byte[]? TData { get; set; }
+    }
+}

PKZIP/MVSExtraField.cs

@@ -0,0 +1,21 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the MVS "extra" block.
+    /// </summary>
+    /// <remarks>Header ID = 0x0065</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class MVSExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// EBCDIC "Z390" 0xE9F3F9F0
+        /// or "T4MV" for TargetFour
+        /// </summary>
+        public uint ID { get; set; }
+
+        /// <summary>
+        /// Attribute data (see APPENDIX B)
+        /// </summary>
+        public byte[]? Var { get; set; }
+    }
+}

PKZIP/MicrosoftOpenPackagingGrowthHint.cs

@@ -0,0 +1,22 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <remarks>Header ID = 0xa220</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class MicrosoftOpenPackagingGrowthHint : ExtensibleDataField
+    {
+        /// <summary>
+        /// Verification signature (A028)
+        /// </summary>
+        public ushort Sig { get; set; }
+
+        /// <summary>
+        /// Initial padding value
+        /// </summary>
+        public ushort PadVal { get; set; }
+
+        /// <summary>
+        /// Filled with NULL characters
+        /// </summary>
+        public byte[]? Padding { get; set; }
+    }
+}

PKZIP/NTFSExtraField.cs

@@ -0,0 +1,36 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the NTFS attributes
+    /// "extra" block. (Note: At this time the Mtime, Atime
+    /// and Ctime values MAY be used on any WIN32 system.)
+    /// </summary>
+    /// <remarks>Header ID = 0x000A</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class NTFSExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Reserved for future use
+        /// </summary>
+        public uint Reserved { get; set; }
+
+        #region Tags, Interleaved
+
+        /// <summary>
+        /// NTFS attribute tag values
+        /// </summary>
+        public ushort[]? Tags { get; set; }
+
+        /// <summary>
+        /// Size of attributes, in bytes
+        /// </summary>
+        public ushort[]? Size { get; set; }
+
+        /// <summary>
+        /// Attribute data
+        /// </summary>
+        public byte[]? Vars { get; set; }
+
+        #endregion
+    }
+}

PKZIP/OS2ExtraField.cs

@@ -0,0 +1,36 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the OS/2 attributes "extra"
+    /// block.  (Last Revision  09/05/95)
+    /// 
+    /// The OS/2 extended attribute structure (FEA2LIST) is
+    /// compressed and then stored in its entirety within this
+    /// structure.  There will only ever be one "block" of data in
+    /// VarFields[].
+    /// </summary>
+    /// <remarks>Header ID = 0x0009</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class OS2ExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Uncompressed Block Size
+        /// </summary>
+        public uint BSize { get; set; }
+
+        /// <summary>
+        /// Compression type
+        /// </summary>
+        public ushort CType { get; set; }
+
+        /// <summary>
+        /// CRC value for uncompress block
+        /// </summary>
+        public uint EACRC { get; set; }
+
+        /// <summary>
+        /// Compressed block
+        /// </summary>
+        public byte[]? Var { get; set; }
+    }
+}

PKZIP/OS400ExtraField.cs

@@ -0,0 +1,21 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the OS/400 "extra" block.
+    /// </summary>
+    /// <remarks>Header ID = 0x0065</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class OS400ExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// EBCDIC "Z390" 0xE9F3F9F0
+        /// or "T4MV" for TargetFour
+        /// </summary>
+        public uint ID { get; set; }
+
+        /// <summary>
+        /// Attribute data (see APPENDIX A)
+        /// </summary>
+        public byte[]? Var { get; set; }
+    }
+}

PKZIP/OpenVMSExtraField.cs

@@ -0,0 +1,50 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the OpenVMS attributes
+    /// "extra" block.
+    /// 
+    /// OpenVMS Extra Field Rules:
+    /// 
+    /// - There will be one or more attributes present, which
+    /// will each be preceded by the above TagX & SizeX values.
+    /// These values are identical to the ATR$C_XXXX and ATR$S_XXXX
+    /// constants which are defined in ATR.H under OpenVMS C.  Neither
+    /// of these values will ever be zero.
+    /// 
+    /// - No word alignment or padding is performed.
+    /// 
+    /// - A well-behaved PKZIP/OpenVMS program SHOULD NOT produce
+    /// more than one sub-block with the same TagX value.  Also, there MUST
+    /// NOT be more than one "extra" block of type 0x000c in a particular
+    /// directory record.
+    /// </summary>
+    /// <remarks>Header ID = 0x000C</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class OpenVMSExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// 32-bit CRC for remainder of the block
+        /// </summary>
+        public uint CRC { get; set; }
+
+        #region Tags, Interleaved
+
+        /// <summary>
+        /// OpenVMS attribute tag values
+        /// </summary>
+        public ushort[]? Tags { get; set; }
+
+        /// <summary>
+        /// Size of attributes, in bytes
+        /// </summary>
+        public ushort[]? Size { get; set; }
+
+        /// <summary>
+        /// Attribute data
+        /// </summary>
+        public byte[]? Vars { get; set; }
+
+        #endregion
+    }
+}

PKZIP/PKCS7EncryptionRecipientCertificateList.cs

@@ -0,0 +1,31 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// This field MAY contain information about each of the certificates
+    /// used in encryption processing and it can be used to identify who is
+    /// allowed to decrypt encrypted files.  This field SHOULD only appear
+    /// in the archive extra data record. This field is not required and
+    /// serves only to aid archive modifications by preserving public
+    /// encryption key data. Individual security requirements may dictate
+    /// that this data be omitted to deter information exposure.
+    /// 
+    /// See the section describing the Strong Encryption Specification
+    /// for details.  Refer to the section in this document entitled
+    /// "Incorporating PKWARE Proprietary Technology into Your Product"
+    /// for more information.
+    /// </summary>
+    /// <remarks>Header ID = 0x0019</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class PKCS7EncryptionRecipientCertificateList : ExtensibleDataField
+    {
+        /// <summary>
+        /// Format version number - MUST be 0x0001 at this time
+        /// </summary>
+        public ushort Version { get; set; }
+
+        /// <summary>
+        /// PKCS#7 data blob
+        /// </summary>
+        public byte[]? CStore { get; set; }
+    }
+}

PKZIP/PKCS7Store.cs

@@ -0,0 +1,20 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// This field MUST contain information about each of the certificates
+    /// files MAY be signed with. When the Central Directory Encryption
+    /// feature is enabled for a ZIP file, this record will appear in
+    /// the Archive Extra Data Record, otherwise it will appear in the
+    /// first central directory record and will be ignored in any
+    /// other record.
+    /// </summary>
+    /// <remarks>Header ID = 0x0014</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class PKCS7Store : ExtensibleDataField
+    {
+        /// <summary>
+        /// Data about the store
+        /// </summary>
+        public byte[]? TData { get; set; }
+    }
+}

PKZIP/PatchDescriptorExtraField.cs

@@ -0,0 +1,50 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the Patch Descriptor
+    /// "extra" block.
+    /// 
+    /// Patch support is provided by PKPatchMaker(tm) technology
+    /// and is covered under U.S. Patents and Patents Pending. The use or
+    /// implementation in a product of certain technological aspects set
+    /// forth in the current APPNOTE, including those with regard to
+    /// strong encryption or patching requires a license from PKWARE.
+    /// Refer to the section in this document entitled "Incorporating
+    /// PKWARE Proprietary Technology into Your Product" for more
+    /// information.
+    /// </summary>
+    /// <remarks>Header ID = 0x000F</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class PatchDescriptorExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Version of the descriptor
+        /// </summary>
+        public ushort Version { get; set; }
+
+        /// <summary>
+        /// Actions and reactions
+        /// </summary>
+        public ActionsReactions Flags { get; set; }
+
+        /// <summary>
+        /// Size of the file about to be patched
+        /// </summary>
+        public uint OldSize { get; set; }
+
+        /// <summary>
+        /// 32-bit CRC of the file to be patched
+        /// </summary>
+        public uint OldCRC { get; set; }
+
+        /// <summary>
+        /// Size of the resulting file
+        /// </summary>
+        public uint NewSize { get; set; }
+
+        /// <summary>
+        /// 32-bit CRC of the resulting file
+        /// </summary>
+        public uint NewCRC { get; set; }
+    }
+}

PKZIP/PolicyDecryptionKeyRecordExtraField.cs

@@ -0,0 +1,22 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the Policy Decryption Key "extra" block.
+    /// TData is a variable length, variable content field.  It holds
+    /// information about encryptions and/or encryption key sources.
+    /// Contact PKWARE for information on current TData structures.
+    /// Information in this "extra" block may aternatively be placed
+    /// within comment fields.  Refer to the section in this document
+    /// entitled "Incorporating PKWARE Proprietary Technology into Your
+    /// Product" for more information.
+    /// </summary>
+    /// <remarks>Header ID = 0x0021</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class PolicyDecryptionKeyRecordExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Data about the key
+        /// </summary>
+        public byte[]? TData { get; set; }
+    }
+}

PKZIP/PolicyKeyDataRecordRecordExtraField.cs

@@ -0,0 +1,22 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the Policy Key Data "extra" block.
+    /// TData is a variable length, variable content field.  It holds
+    /// information about encryptions and/or encryption key sources.
+    /// Contact PKWARE for information on current TData structures.
+    /// Information in this "extra" block may aternatively be placed
+    /// within comment fields.  Refer to the section in this document 
+    /// entitled "Incorporating PKWARE Proprietary Technology into Your
+    /// Product" for more information.
+    /// </summary>
+    /// <remarks>Header ID = 0x0023</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class PolicyKeyDataRecordRecordExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Data about the key
+        /// </summary>
+        public byte[]? TData { get; set; }
+    }
+}

PKZIP/RecordManagementControls.cs

@@ -0,0 +1,26 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <remarks>Header ID = 0x0018</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class RecordManagementControls : ExtensibleDataField
+    {
+        #region Tags, Interleaved
+
+        /// <summary>
+        /// NTFS attribute tag values
+        /// </summary>
+        public ushort[]? Tags { get; set; }
+
+        /// <summary>
+        /// Size of attributes, in bytes
+        /// </summary>
+        public ushort[]? Size { get; set; }
+
+        /// <summary>
+        /// Attribute data
+        /// </summary>
+        public byte[]? Vars { get; set; }
+
+        #endregion
+    }
+}

PKZIP/StrongEncryptionHeader.cs

@@ -0,0 +1,44 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// See the section describing the Strong Encryption Specification
+    /// for details.  Refer to the section in this document entitled
+    /// "Incorporating PKWARE Proprietary Technology into Your Product"
+    /// for more information.
+    /// </summary>
+    /// <remarks>Header ID = 0x0017</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class StrongEncryptionHeader : ExtensibleDataField
+    {
+        /// <summary>
+        /// Format definition for this record
+        /// </summary>
+        public ushort Format { get; set; }
+
+        /// <summary>
+        /// Encryption algorithm identifier
+        /// </summary>
+        public ushort AlgID { get; set; }
+
+        /// <summary>
+        /// Bit length of encryption key
+        /// </summary>
+        public ushort Bitlen { get; set; }
+
+        /// <summary>
+        /// Processing flags
+        /// </summary>
+        public ushort Flags { get; set; }
+
+        /// <summary>
+        /// Certificate decryption extra field data
+        /// </summary>
+        /// <remarks>
+        /// Refer to the explanation for CertData
+        /// in the section describing the
+        /// Certificate Processing Method under
+        /// the Strong Encryption Specification
+        /// </remarks>
+        public byte[]? CertData { get; set; }
+    }
+}

PKZIP/UnixExtraField.cs

@@ -0,0 +1,49 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the UNIX "extra" block.
+    /// 
+    /// The variable length data field will contain file type
+    /// specific data.  Currently the only values allowed are
+    /// the original "linked to" file names for hard or symbolic
+    /// links, and the major and minor device node numbers for
+    /// character and block device nodes.  Since device nodes
+    /// cannot be either symbolic or hard links, only one set of
+    /// variable length data is stored.  Link files will have the
+    /// name of the original file stored.  This name is NOT NULL
+    /// terminated.  Its size can be determined by checking TSize -
+    /// 12.  Device entries will have eight bytes stored as two 4
+    /// byte entries (in little endian format).  The first entry
+    /// will be the major device number, and the second the minor
+    /// device number.
+    /// </summary>
+    /// <remarks>Header ID = 0x000D</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class UnixExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// File last access time
+        /// </summary>
+        public uint Atime { get; set; }
+
+        /// <summary>
+        /// File last modification time
+        /// </summary>
+        public uint Mtime { get; set; }
+
+        /// <summary>
+        /// File user ID
+        /// </summary>
+        public ushort Uid { get; set; }
+
+        /// <summary>
+        /// File group ID
+        /// </summary>
+        public ushort Gid { get; set; }
+
+        /// <summary>
+        /// Variable length data field
+        /// </summary>
+        public byte[]? Var { get; set; }
+    }
+}

PKZIP/X509CentralDirectory.cs

@@ -0,0 +1,19 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// This field contains the information about which certificate in
+    /// the PKCS#7 store was used to sign the central directory structure.
+    /// When the Central Directory Encryption feature is enabled for a
+    /// ZIP file, this record will appear in the Archive Extra Data Record,
+    /// otherwise it will appear in the first central directory record.
+    /// </summary>
+    /// <remarks>Header ID = 0x0016</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class X509CentralDirectory : ExtensibleDataField
+    {
+        /// <summary>
+        /// Data
+        /// </summary>
+        public byte[]? TData { get; set; }
+    }
+}

PKZIP/X509IndividualFile.cs

@@ -0,0 +1,18 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// This field contains the information about which certificate in
+    /// the PKCS#7 store was used to sign a particular file. It also
+    /// contains the signature data. This field can appear multiple
+    /// times, but can only appear once per certificate.
+    /// </summary>
+    /// <remarks>Header ID = 0x0015</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class X509IndividualFile : ExtensibleDataField
+    {
+        /// <summary>
+        /// Signature Data
+        /// </summary>
+        public byte[]? TData { get; set; }
+    }
+}

PKZIP/ZOSExtraFieldAttribute.cs

@@ -0,0 +1,26 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// z/OS Extra Field (0x0065) Attribute [APPENDIX B]
+    /// </summary>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class ZOSExtraFieldAttribute : ExtensibleDataField
+    {
+        /// <summary>
+        /// Field length including length
+        /// </summary>
+        /// <remarks>Big-endian</remarks>
+        public ushort FieldLength { get; set; }
+
+        /// <summary>
+        /// Field code
+        /// </summary>
+        public ZOSExtraFieldAttributeFieldCode FieldCode { get; set; }
+
+        /// <summary>
+        /// Data
+        /// </summary>
+        /// <remarks>Variable byte length based on field code</remarks>
+        public byte[]? Data { get; set; }
+    }
+}

PKZIP/Zip64ExtendedInformationExtraField.cs

@@ -0,0 +1,48 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the zip64 extended 
+    /// information "extra" block. If one of the size or
+    /// offset fields in the Local or Central directory
+    /// record is too small to hold the required data,
+    /// a Zip64 extended information record is created.
+    /// The order of the fields in the zip64 extended 
+    /// information record is fixed, but the fields MUST
+    /// only appear if the corresponding Local or Central
+    /// directory record field is set to 0xFFFF or 0xFFFFFFFF.
+    /// 
+    /// This entry in the Local header MUST include BOTH original
+    /// and compressed file size fields. If encrypting the 
+    /// central directory and bit 13 of the general purpose bit
+    /// flag is set indicating masking, the value stored in the
+    /// Local Header for the original file size will be zero.
+    /// </summary>
+    /// <remarks>Header ID = 0x0001</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class Zip64ExtendedInformationExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// Original uncompressed file size
+        /// </summary>
+        /// <remarks>Only exists if parent entry corresponding value is max</remarks>
+        public ulong? OriginalSize { get; set; }
+
+        /// <summary>
+        /// Size of compressed data
+        /// </summary>
+        /// <remarks>Only exists if parent entry corresponding value is max</remarks>
+        public ulong? CompressedSize { get; set; }
+
+        /// <summary>
+        /// Offset of local header record
+        /// </summary>
+        /// <remarks>Only exists if parent entry corresponding value is max</remarks>
+        public ulong? RelativeHeaderOffset { get; set; }
+
+        /// <summary>
+        /// Number of the disk on which this file starts
+        /// </summary>
+        /// <remarks>Only exists if parent entry corresponding value is max</remarks>
+        public uint? DiskStartNumber { get; set; }
+    }
+}

PKZIP/ZipItMacintoshExtraField.cs

@@ -0,0 +1,41 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of the ZipIt extra block
+    /// for Macintosh. The local-header and central-header versions
+    /// are identical. This block MUST be present if the file is
+    /// stored MacBinary-encoded and it SHOULD NOT be used if the file
+    /// is not stored MacBinary-encoded.
+    /// </summary>
+    /// <remarks>Header ID = 0x2605</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class ZipItMacintoshExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// "ZPIT" - extra-field signature
+        /// </summary>
+        public uint ExtraFieldSignature { get; set; }
+
+        /// <summary>
+        /// Length of FileName
+        /// </summary>
+        public byte FnLen { get; set; }
+
+        /// <summary>
+        /// Full Macintosh filename
+        /// </summary>
+        public string? FileName { get; set; }
+
+        /// <summary>
+        /// Four-byte Mac file type string
+        /// </summary>
+        /// <remarks>4 bytes</remarks>
+        public byte[]? FileType { get; set; }
+
+        /// <summary>
+        /// Four-byte Mac creator string
+        /// </summary>
+        /// <remarks>4 bytes</remarks>
+        public byte[]? Creator { get; set; }
+    }
+}

PKZIP/ZipItMacintoshShortDirectoryExtraField.cs

@@ -0,0 +1,29 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of a shortened variant of the
+    /// ZipIt extra block for Macintosh used only for directory
+    /// entries. This variant is used by ZipIt 1.3.5 and newer to 
+    /// save some optional Mac-specific information about directories.
+    /// The local-header and central-header versions are identical.
+    /// </summary>
+    /// <remarks>Header ID = 0x2805</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class ZipItMacintoshShortDirectoryExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// "ZPIT" - extra-field signature
+        /// </summary>
+        public uint ExtraFieldSignature { get; set; }
+
+        /// <summary>
+        /// attributes from DInfo.frFlags, MAY be omitted
+        /// </summary>
+        public ushort? FrFlags { get; set; }
+
+        /// <summary>
+        /// ZipIt view flag, MAY be omitted
+        /// </summary>
+        public ZipItInternalSettings? View { get; set; }
+    }
+}

PKZIP/ZipItMacintoshShortFileExtraField.cs

@@ -0,0 +1,41 @@
+namespace SabreTools.Models.PKZIP
+{
+    /// <summary>
+    /// The following is the layout of a shortened variant of the
+    /// ZipIt extra block for Macintosh (without "full name" entry).
+    /// This variant is used by ZipIt 1.3.5 and newer for entries of
+    /// files (not directories) that do not have a MacBinary encoded
+    /// file. The local-header and central-header versions are identical.
+    /// </summary>
+    /// <remarks>Header ID = 0x2705</remarks>
+    /// <see href="https://pkware.cachefly.net/webdocs/casestudies/APPNOTE.TXT"/> 
+    public class ZipItMacintoshShortFileExtraField : ExtensibleDataField
+    {
+        /// <summary>
+        /// "ZPIT" - extra-field signature
+        /// </summary>
+        public uint ExtraFieldSignature { get; set; }
+
+        /// <summary>
+        /// Four-byte Mac file type string
+        /// </summary>
+        /// <remarks>4 bytes</remarks>
+        public byte[]? FileType { get; set; }
+
+        /// <summary>
+        /// Four-byte Mac creator string
+        /// </summary>
+        /// <remarks>4 bytes</remarks>
+        public byte[]? Creator { get; set; }
+
+        /// <summary>
+        /// Attributes from FInfo.frFlags, MAY be omitted
+        /// </summary>
+        public ushort? FdFlags { get; set; }
+
+        /// <summary>
+        /// Reserved, MAY be omitted
+        /// </summary>
+        public ushort? Reserved { get; set; }
+    }
+}

PortableExecutable/BaseRelocationTypeOffsetFieldEntry.cs

@@ -1,12 +1,9 @@
-using System.Runtime.InteropServices;
-
-namespace SabreTools.Models.PortableExecutable
+namespace SabreTools.Models.PortableExecutable
 {
     /// <summary>
     /// Type or Offset field entry is a WORD (2 bytes).
     /// </summary>
     /// <see href="https://learn.microsoft.com/en-us/windows/win32/debug/pe-format"/>
-    [StructLayout(LayoutKind.Sequential)]
     public sealed class BaseRelocationTypeOffsetFieldEntry
     {
         /// <summary>

PortableExecutable/HintNameTableEntry.cs

@@ -1,9 +1,12 @@
-namespace SabreTools.Models.PortableExecutable
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.PortableExecutable
 {
     /// <summary>
     /// One hint/name table suffices for the entire import section.
     /// </summary>
     /// <see href="https://learn.microsoft.com/en-us/windows/win32/debug/pe-format"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class HintNameTableEntry
     {
         /// <summary>
@@ -11,13 +14,14 @@
         /// with this value. If it fails, a binary search is performed on the DLL's
         /// export name pointer table.
         /// </summary>
-        public ushort Hint { get; set; }
+        public ushort Hint;
 
         /// <summary>
         /// An ASCII string that contains the name to import. This is the string that
         /// must be matched to the public name in the DLL. This string is case sensitive
         /// and terminated by a null byte.
         /// </summary>
-        public string? Name { get; set; }
+        [MarshalAs(UnmanagedType.LPStr)]
+        public string? Name;
     }
 }

PortableExecutable/MenuHeader.cs

@@ -3,23 +3,10 @@
 namespace SabreTools.Models.PortableExecutable
 {
     /// <summary>
-    /// Contains version information for the menu resource. The structure definition provided
-    /// here is for explanation only; it is not present in any standard header file.
+    /// Common base class for menu item types
     /// </summary>
     /// <see href="https://learn.microsoft.com/en-us/windows/win32/menurc/menuheader"/>
+    /// <see href="https://learn.microsoft.com/en-us/windows/win32/menurc/menuex-template-header"/>
     [StructLayout(LayoutKind.Sequential)]
-    public sealed class MenuHeader
-    {
-        /// <summary>
-        /// The version number of the menu template. This member must be equal to zero to indicate
-        /// that this is an RT_MENU created with a standard menu template.
-        /// </summary>
-        public ushort Version;
-
-        /// <summary>
-        /// The size of the menu template header. This value is zero for menus you create with a
-        /// standard menu template.
-        /// </summary>
-        public ushort HeaderSize;
-    }
+    public abstract class MenuHeader { }
 }