Bump version

* XboxOne catalog.js model

* Split Catalog object, bump version

* Minor fixes

* Custom JsonConverter for launchPackage

* Make launchPackage an abstract object

* Don't ignore packages

* Fix field types for Catalog/Package

.github/workflows/build_nupkg.yml

@@ -0,0 +1,43 @@
+name: Nuget Pack
+
+on:
+  push:
+    branches: [ "main" ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        submodules: recursive
+    
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 8.0.x
+        
+    - name: Restore dependencies
+      run: dotnet restore
+      
+    - name: Pack
+      run: dotnet pack
+
+    - name: Upload build
+      uses: actions/upload-artifact@v4
+      with:
+        name: 'Nuget Package'
+        path: 'bin/Release/*.nupkg'
+
+    - name: Upload to rolling
+      uses: ncipollo/release-action@v1.14.0
+      with:
+        allowUpdates: True
+        artifacts: 'bin/Release/*.nupkg'
+        body: 'Last built commit: ${{ github.sha }}'
+        name: 'Rolling Release'
+        prerelease: True
+        replacesArtifacts: True
+        tag: "rolling"
+        updateOnlyUnreleased: True

.github/workflows/check_pr.yml

@@ -0,0 +1,17 @@
+name: Build PR
+
+on: [pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: 8.0.x
+      
+    - name: Build
+      run: dotnet build

AACS/CopyrightRecord.cs

@@ -1,17 +1,17 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.AACS
 {
     /// <summary>
     /// This record type is undocumented but found in real media key blocks
     /// </summary>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class CopyrightRecord : Record
     {
         /// <summary>
         /// Null-terminated ASCII string representing the copyright
         /// </summary>
-#if NET48
-        public string Copyright { get; set; }
-#else
-        public string? Copyright { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.LPStr)]
+        public string? Copyright;
     }
 }

AACS/DriveRevocationListEntry.cs

@@ -1,6 +1,9 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.AACS
 {
     /// <see href="https://aacsla.com/wp-content/uploads/2019/02/AACS_Spec_Common_Final_0953.pdf"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class DriveRevocationListEntry
     {
         /// <summary>
@@ -9,17 +12,14 @@ namespace SabreTools.Models.AACS
         /// field indicates that only one ID is being revoked, a value of one
         /// in the Range field indicates two ID’s are being revoked, and so on.
         /// </summary>
-        public ushort Range { get; set; }
+        public ushort Range;
 
         /// <summary>
         /// A 6-byte Drive ID value identifying the Licensed Drive being revoked
         /// (or the first in a range of Licensed Drives being revoked, in the
         /// case of a non-zero Range value).
         /// </summary>
-#if NET48
-        public byte[] DriveID { get; set; }
-#else
-        public byte[]? DriveID { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? DriveID;
     }
 }

AACS/DriveRevocationListRecord.cs

@@ -21,10 +21,6 @@ namespace SabreTools.Models.AACS
         /// <summary>
         /// Revocation list entries
         /// </summary>
-#if NET48
-        public DriveRevocationSignatureBlock[] SignatureBlocks { get; set; }
-#else
         public DriveRevocationSignatureBlock?[]? SignatureBlocks { get; set; }
-#endif
     }
 }

AACS/DriveRevocationSignatureBlock.cs

@@ -12,10 +12,6 @@ namespace SabreTools.Models.AACS
         /// A list of 8-byte Host Drive List Entry fields, the length of this
         /// list being equal to the number in the signature block.
         /// </summary>
-#if NET48
-        public DriveRevocationListEntry[] EntryFields { get; set; }
-#else
         public DriveRevocationListEntry?[]? EntryFields { get; set; }
-#endif
     }
 }

AACS/EndOfMediaKeyBlockRecord.cs

@@ -18,10 +18,6 @@ namespace SabreTools.Models.AACS
         /// determines that the signature does not verify or is omitted, it
         /// must refuse to use the Media Key.
         /// </summary>
-#if NET48
-        public byte[] SignatureData { get; set; }
-#else
         public byte[]? SignatureData { get; set; }
-#endif
     }
 }

AACS/ExplicitSubsetDifferenceRecord.cs

@@ -6,10 +6,6 @@ namespace SabreTools.Models.AACS
         /// <summary>
         /// In this record, each subset-difference is encoded with 5 bytes.
         /// </summary>
-#if NET48
-        public SubsetDifference[] SubsetDifferences { get; set; }
-#else
         public SubsetDifference?[]? SubsetDifferences { get; set; }
-#endif
     }
 }

AACS/HostRevocationListEntry.cs

@@ -1,6 +1,9 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.AACS
 {
     /// <see href="https://aacsla.com/wp-content/uploads/2019/02/AACS_Spec_Common_Final_0953.pdf"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class HostRevocationListEntry
     {
         /// <summary>
@@ -9,17 +12,14 @@ namespace SabreTools.Models.AACS
         /// field indicates that only one ID is being revoked, a value of one
         /// in the Range field indicates two ID’s are being revoked, and so on.
         /// </summary>
-        public ushort Range { get; set; }
+        public ushort Range;
 
         /// <summary>
         /// A 6-byte Host ID value identifying the host being revoked (or the
         /// first in a range of hosts being revoked, in the case of a non-zero
         /// Range value).
         /// </summary>
-#if NET48
-        public byte[] HostID { get; set; }
-#else
-        public byte[]? HostID { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? HostID;
     }
 }

AACS/HostRevocationListRecord.cs

@@ -24,10 +24,6 @@ namespace SabreTools.Models.AACS
         /// <summary>
         /// Revocation list entries
         /// </summary>
-#if NET48
-        public HostRevocationSignatureBlock[] SignatureBlocks { get; set; }
-#else
         public HostRevocationSignatureBlock?[]? SignatureBlocks { get; set; }
-#endif
     }
 }

AACS/HostRevocationSignatureBlock.cs

@@ -12,10 +12,6 @@ namespace SabreTools.Models.AACS
         /// A list of 8-byte Host Revocation List Entry fields, the length of this
         /// list being equal to the number in the signature block.
         /// </summary>
-#if NET48
-        public HostRevocationListEntry[] EntryFields { get; set; }
-#else
         public HostRevocationListEntry?[]? EntryFields { get; set; }
-#endif
     }
 }

AACS/MediaKeyBlock.cs

@@ -9,10 +9,6 @@ namespace SabreTools.Models.AACS
         /// <summary>
         /// Records
         /// </summary>
-#if NET48
-        public Record[] Records { get; set; }
-#else
         public Record?[]? Records { get; set; }
-#endif
     }
 }

AACS/MediaKeyDataRecord.cs

@@ -13,10 +13,6 @@ namespace SabreTools.Models.AACS
         /// record. This 16 bytes is the ciphertext value C in the media
         /// key calculation.
         /// </summary>
-#if NET48
-        public byte[][] MediaKeyData { get; set; }
-#else
         public byte[][]? MediaKeyData { get; set; }
-#endif
     }
 }

AACS/SubsetDifference.cs

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

AACS/SubsetDifferenceIndexRecord.cs

@@ -21,10 +21,6 @@ namespace SabreTools.Models.AACS
         /// Subset-Difference record, with 0 being the start of the record.
         /// </summary>
         // <remarks>UInt24 not UInt32</remarks>
-#if NET48
-        public uint[] Offsets { get; set; }
-#else
         public uint[]? Offsets { get; set; }
-#endif
     }
 }

AACS/VerifyMediaKeyRecord.cs

@@ -19,10 +19,6 @@ namespace SabreTools.Models.AACS
         /// where 0xXXXXXXXXXXXXXXXX is an arbitrary 8-byte value, and Km is
         /// the correct final Media Key value.
         /// </summary>
-#if NET48
-        public byte[] CiphertextValue { get; set; }
-#else
         public byte[]? CiphertextValue { get; set; }
-#endif
     }
 }

ArchiveDotOrg/File.cs

@@ -7,438 +7,198 @@ namespace SabreTools.Models.ArchiveDotOrg
     public class File
     {
         [XmlAttribute("name")]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>Is this a set of defined values?</remarks>
         [XmlAttribute("source")]
-#if NET48
-        public string Source { get; set; }
-#else
         public string? Source { get; set; }
-#endif
 
         [XmlElement("btih")]
-#if NET48
-        public string BitTorrentMagnetHash { get; set; }
-#else
         public string? BitTorrentMagnetHash { get; set; }
-#endif
 
         [XmlElement("mtime")]
-#if NET48
-        public string LastModifiedTime { get; set; }
-#else
         public string? LastModifiedTime { get; set; }
-#endif
 
         [XmlElement("size")]
-#if NET48
-        public string Size { get; set; }
-#else
         public string? Size { get; set; }
-#endif
 
         [XmlElement("md5")]
-#if NET48
-        public string MD5 { get; set; }
-#else
         public string? MD5 { get; set; }
-#endif
 
         [XmlElement("crc32")]
-#if NET48
-        public string CRC32 { get; set; }
-#else
         public string? CRC32 { get; set; }
-#endif
 
         [XmlElement("sha1")]
-#if NET48
-        public string SHA1 { get; set; }
-#else
         public string? SHA1 { get; set; }
-#endif
 
         [XmlElement("filecount")]
-#if NET48
-        public string FileCount { get; set; }
-#else
         public string? FileCount { get; set; }
-#endif
 
         /// <remarks>Is this a set of defined values?</remarks>
         [XmlElement("format")]
-#if NET48
-        public string Format { get; set; }
-#else
         public string? Format { get; set; }
-#endif
 
         [XmlElement("original")]
-#if NET48
-        public string Original { get; set; }
-#else
         public string? Original { get; set; }
-#endif
 
         /// <remarks>Is this a set of defined values?</remarks>
         [XmlElement("summation")]
-#if NET48
-        public string Summation { get; set; }
-#else
         public string? Summation { get; set; }
-#endif
 
         [XmlElement("matrix_number")]
-#if NET48
-        public string MatrixNumber { get; set; }
-#else
         public string? MatrixNumber { get; set; }
-#endif
 
         [XmlElement("collection-catalog-number")]
-#if NET48
-        public string CollectionCatalogNumber { get; set; }
-#else
         public string? CollectionCatalogNumber { get; set; }
-#endif
 
         [XmlElement("publisher")]
-#if NET48
-        public string Publisher { get; set; }
-#else
         public string? Publisher { get; set; }
-#endif
 
         [XmlElement("comment")]
-#if NET48
-        public string Comment { get; set; }
-#else
         public string? Comment { get; set; }
-#endif
 
         #region ASR-Related
 
         [XmlElement("asr_detected_lang")]
-#if NET48
-        public string ASRDetectedLang { get; set; }
-#else
         public string? ASRDetectedLang { get; set; }
-#endif
 
         [XmlElement("asr_detected_lang_conf")]
-#if NET48
-        public string ASRDetectedLangConf { get; set; }
-#else
         public string? ASRDetectedLangConf { get; set; }
-#endif
 
         [XmlElement("asr_transcribed_lang")]
-#if NET48
-        public string ASRTranscribedLang { get; set; }
-#else
         public string? ASRTranscribedLang { get; set; }
-#endif
 
         [XmlElement("whisper_asr_module_version")]
-#if NET48
-        public string WhisperASRModuleVersion { get; set; }
-#else
         public string? WhisperASRModuleVersion { get; set; }
-#endif
 
         [XmlElement("whisper_model_hash")]
-#if NET48
-        public string WhisperModelHash { get; set; }
-#else
         public string? WhisperModelHash { get; set; }
-#endif
 
         [XmlElement("whisper_model_name")]
-#if NET48
-        public string WhisperModelName { get; set; }
-#else
         public string? WhisperModelName { get; set; }
-#endif
 
         [XmlElement("whisper_version")]
-#if NET48
-        public string WhisperVersion { get; set; }
-#else
         public string? WhisperVersion { get; set; }
-#endif
 
         #endregion
 
         #region OCR-Related
 
         [XmlElement("cloth_cover_detection_module_version")]
-#if NET48
-        public string ClothCoverDetectionModuleVersion { get; set; }
-#else
         public string? ClothCoverDetectionModuleVersion { get; set; }
-#endif
 
         [XmlElement("hocr_char_to_word_hocr_version")]
-#if NET48
-        public string hOCRCharToWordhOCRVersion { get; set; }
-#else
         public string? hOCRCharToWordhOCRVersion { get; set; }
-#endif
 
         [XmlElement("hocr_char_to_word_module_version")]
-#if NET48
-        public string hOCRCharToWordModuleVersion { get; set; }
-#else
         public string? hOCRCharToWordModuleVersion { get; set; }
-#endif
 
         [XmlElement("hocr_fts_text_hocr_version")]
-#if NET48
-        public string hOCRFtsTexthOCRVersion { get; set; }
-#else
         public string? hOCRFtsTexthOCRVersion { get; set; }
-#endif
 
         [XmlElement("hocr_fts_text_module_version")]
-#if NET48
-        public string hOCRFtsTextModuleVersion { get; set; }
-#else
         public string? hOCRFtsTextModuleVersion { get; set; }
-#endif
 
         [XmlElement("hocr_pageindex_hocr_version")]
-#if NET48
-        public string hOCRPageIndexhOCRVersion { get; set; }
-#else
         public string? hOCRPageIndexhOCRVersion { get; set; }
-#endif
 
         [XmlElement("hocr_pageindex_module_version")]
-#if NET48
-        public string hOCRPageIndexModuleVersion { get; set; }
-#else
         public string? hOCRPageIndexModuleVersion { get; set; }
-#endif
 
         [XmlElement("ocr")]
-#if NET48
-        public string TesseractOCR { get; set; }
-#else
         public string? TesseractOCR { get; set; }
-#endif
 
         [XmlElement("ocr_converted")]
-#if NET48
-        public string TesseractOCRConverted { get; set; }
-#else
         public string? TesseractOCRConverted { get; set; }
-#endif
 
         [XmlElement("ocr_detected_lang")]
-#if NET48
-        public string TesseractOCRDetectedLang { get; set; }
-#else
         public string? TesseractOCRDetectedLang { get; set; }
-#endif
 
         [XmlElement("ocr_detected_lang_conf")]
-#if NET48
-        public string TesseractOCRDetectedLangConf { get; set; }
-#else
         public string? TesseractOCRDetectedLangConf { get; set; }
-#endif
 
         [XmlElement("ocr_detected_script")]
-#if NET48
-        public string TesseractOCRDetectedScript { get; set; }
-#else
         public string? TesseractOCRDetectedScript { get; set; }
-#endif
 
         [XmlElement("ocr_detected_script_conf")]
-#if NET48
-        public string TesseractOCRDetectedScriptConf { get; set; }
-#else
         public string? TesseractOCRDetectedScriptConf { get; set; }
-#endif
 
         [XmlElement("ocr_module_version")]
-#if NET48
-        public string TesseractOCRModuleVersion { get; set; }
-#else
         public string? TesseractOCRModuleVersion { get; set; }
-#endif
 
         [XmlElement("ocr_parameters")]
-#if NET48
-        public string TesseractOCRParameters { get; set; }
-#else
         public string? TesseractOCRParameters { get; set; }
-#endif
 
         [XmlElement("pdf_module_version")]
-#if NET48
-        public string PDFModuleVersion { get; set; }
-#else
         public string? PDFModuleVersion { get; set; }
-#endif
 
         [XmlElement("word_conf_0_10")]
-#if NET48
-        public string WordConfidenceInterval0To10 { get; set; }
-#else
         public string? WordConfidenceInterval0To10 { get; set; }
-#endif
 
         [XmlElement("word_conf_11_20")]
-#if NET48
-        public string WordConfidenceInterval11To20 { get; set; }
-#else
         public string? WordConfidenceInterval11To20 { get; set; }
-#endif
 
         [XmlElement("word_conf_21_30")]
-#if NET48
-        public string WordConfidenceInterval21To30 { get; set; }
-#else
         public string? WordConfidenceInterval21To30 { get; set; }
-#endif
 
         [XmlElement("word_conf_31_40")]
-#if NET48
-        public string WordConfidenceInterval31To40 { get; set; }
-#else
         public string? WordConfidenceInterval31To40 { get; set; }
-#endif
 
         [XmlElement("word_conf_41_50")]
-#if NET48
-        public string WordConfidenceInterval41To50 { get; set; }
-#else
         public string? WordConfidenceInterval41To50 { get; set; }
-#endif
 
         [XmlElement("word_conf_51_60")]
-#if NET48
-        public string WordConfidenceInterval51To60 { get; set; }
-#else
         public string? WordConfidenceInterval51To60 { get; set; }
-#endif
 
         [XmlElement("word_conf_61_70")]
-#if NET48
-        public string WordConfidenceInterval61To70 { get; set; }
-#else
         public string? WordConfidenceInterval61To70 { get; set; }
-#endif
 
         [XmlElement("word_conf_71_80")]
-#if NET48
-        public string WordConfidenceInterval71To80 { get; set; }
-#else
         public string? WordConfidenceInterval71To80 { get; set; }
-#endif
 
         [XmlElement("word_conf_81_90")]
-#if NET48
-        public string WordConfidenceInterval81To90 { get; set; }
-#else
         public string? WordConfidenceInterval81To90 { get; set; }
-#endif
 
         [XmlElement("word_conf_91_100")]
-#if NET48
-        public string WordConfidenceInterval91To100 { get; set; }
-#else
         public string? WordConfidenceInterval91To100 { get; set; }
-#endif
 
         #endregion
 
         #region Media-Related
 
         [XmlElement("album")]
-#if NET48
-        public string Album { get; set; }
-#else
         public string? Album { get; set; }
-#endif
 
         [XmlElement("artist")]
-#if NET48
-        public string Artist { get; set; }
-#else
         public string? Artist { get; set; }
-#endif
 
         [XmlElement("bitrate")]
-#if NET48
-        public string Bitrate { get; set; }
-#else
         public string? Bitrate { get; set; }
-#endif
 
         [XmlElement("creator")]
-#if NET48
-        public string Creator { get; set; }
-#else
         public string? Creator { get; set; }
-#endif
 
         [XmlElement("height")]
-#if NET48
-        public string Height { get; set; }
-#else
         public string? Height { get; set; }
-#endif
 
         [XmlElement("length")]
-#if NET48
-        public string Length { get; set; }
-#else
         public string? Length { get; set; }
-#endif
 
         [XmlElement("preview-image")]
-#if NET48
-        public string PreviewImage { get; set; }
-#else
         public string? PreviewImage { get; set; }
-#endif
 
         /// <remarks>Is this a set of defined values?</remarks>
         [XmlElement("rotation")]
-#if NET48
-        public string Rotation { get; set; }
-#else
         public string? Rotation { get; set; }
-#endif
 
         [XmlElement("title")]
-#if NET48
-        public string Title { get; set; }
-#else
         public string? Title { get; set; }
-#endif
 
         [XmlElement("track")]
-#if NET48
-        public string Track { get; set; }
-#else
         public string? Track { get; set; }
-#endif
 
         [XmlElement("width")]
-#if NET48
-        public string Width { get; set; }
-#else
         public string? Width { get; set; }
-#endif
 
         #endregion
 
@@ -446,19 +206,11 @@ namespace SabreTools.Models.ArchiveDotOrg
 
         /// <remarks>Should be empty</remarks>
         [XmlAnyAttribute]
-#if NET48
-        public XmlAttribute[] ADDITIONAL_ATTRIBUTES { get; set; }
-#else
         public XmlAttribute[]? ADDITIONAL_ATTRIBUTES { get; set; }
-#endif
 
         /// <remarks>Should be empty</remarks>
         [XmlAnyElement]
-#if NET48
-        public object[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public object[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ArchiveDotOrg/Files.cs

@@ -7,29 +7,17 @@ namespace SabreTools.Models.ArchiveDotOrg
     public class Files
     {
         [XmlElement("file")]
-#if NET48
-        public File[] File { get; set; }
-#else
         public File?[]? File { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
         [XmlAnyAttribute]
-#if NET48
-        public XmlAttribute[] ADDITIONAL_ATTRIBUTES { get; set; }
-#else
         public XmlAttribute[]? ADDITIONAL_ATTRIBUTES { get; set; }
-#endif
 
         /// <remarks>Should be empty</remarks>
         [XmlAnyElement]
-#if NET48
-        public object[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public object[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

AttractMode/MetadataFile.cs

@@ -6,16 +6,8 @@ namespace SabreTools.Models.AttractMode
     public class MetadataFile
     {
         [Required]
-#if NET48
-        public string[] Header { get; set; }
-#else
         public string[]? Header { get; set; }
-#endif
 
-#if NET48
-        public Row[] Row { get; set; }
-#else
         public Row?[]? Row { get; set; }
-#endif
     }
 }

AttractMode/Row.cs

@@ -4,146 +4,54 @@ namespace SabreTools.Models.AttractMode
     {
         /// <remarks>Also called Romname</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
-#if NET48
-        public string Title { get; set; }
-#else
         public string? Title { get; set; }
-#endif
 
-#if NET48
-        public string Emulator { get; set; }
-#else
         public string? Emulator { get; set; }
-#endif
 
-#if NET48
-        public string CloneOf { get; set; }
-#else
         public string? CloneOf { get; set; }
-#endif
 
-#if NET48
-        public string Year { get; set; }
-#else
         public string? Year { get; set; }
-#endif
 
-#if NET48
-        public string Manufacturer { get; set; }
-#else
         public string? Manufacturer { get; set; }
-#endif
 
-#if NET48
-        public string Category { get; set; }
-#else
         public string? Category { get; set; }
-#endif
 
-#if NET48
-        public string Players { get; set; }
-#else
         public string? Players { get; set; }
-#endif
 
-#if NET48
-        public string Rotation { get; set; }
-#else
         public string? Rotation { get; set; }
-#endif
 
-#if NET48
-        public string Control { get; set; }
-#else
         public string? Control { get; set; }
-#endif
 
-#if NET48
-        public string Status { get; set; }
-#else
         public string? Status { get; set; }
-#endif
 
-#if NET48
-        public string DisplayCount { get; set; }
-#else
         public string? DisplayCount { get; set; }
-#endif
 
-#if NET48
-        public string DisplayType { get; set; }
-#else
         public string? DisplayType { get; set; }
-#endif
 
-#if NET48
-        public string AltRomname { get; set; }
-#else
         public string? AltRomname { get; set; }
-#endif
 
-#if NET48
-        public string AltTitle { get; set; }
-#else
         public string? AltTitle { get; set; }
-#endif
 
-#if NET48
-        public string Extra { get; set; }
-#else
         public string? Extra { get; set; }
-#endif
 
-#if NET48
-        public string Buttons { get; set; }
-#else
         public string? Buttons { get; set; }
-#endif
 
-#if NET48
-        public string Favorite { get; set; }
-#else
         public string? Favorite { get; set; }
-#endif
 
-#if NET48
-        public string Tags { get; set; }
-#else
         public string? Tags { get; set; }
-#endif
 
-#if NET48
-        public string PlayedCount { get; set; }
-#else
         public string? PlayedCount { get; set; }
-#endif
 
-#if NET48
-        public string PlayedTime { get; set; }
-#else
         public string? PlayedTime { get; set; }
-#endif
 
-#if NET48
-        public string FileIsAvailable { get; set; }
-#else
         public string? FileIsAvailable { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

BDPlus/SVM.cs

@@ -6,20 +6,14 @@ namespace SabreTools.Models.BDPlus
         /// <summary>
         /// "BDSVM_CC"
         /// </summary>
-#if NET48
-        public string Signature { get; set; }
-#else
+        /// <remarks>8 bytes</remarks>
         public string? Signature { get; set; }
-#endif
 
         /// <summary>
-        /// 5 bytes of unknown data
+        /// Unknown data
         /// </summary>
-#if NET48
-        public byte[] Unknown1 { get; set; }
-#else
+        /// <remarks>5 bytes</remarks>
         public byte[]? Unknown1 { get; set; }
-#endif
 
         /// <summary>
         /// Version year
@@ -37,13 +31,10 @@ namespace SabreTools.Models.BDPlus
         public byte Day { get; set; }
 
         /// <summary>
-        /// 4 bytes of unknown data
+        /// Unknown data
         /// </summary>
-#if NET48
-        public byte[] Unknown2 { get; set; }
-#else
+        /// <remarks>4 bytes</remarks>
         public byte[]? Unknown2 { get; set; }
-#endif
 
         /// <summary>
         /// Length
@@ -53,10 +44,6 @@ namespace SabreTools.Models.BDPlus
         /// <summary>
         /// Length bytes of data
         /// </summary>
-#if NET48
-        public byte[] Data { get; set; }
-#else
         public byte[]? Data { get; set; }
-#endif
     }
 }

BFPK/Archive.cs

@@ -9,19 +9,11 @@
         /// <summary>
         /// Header
         /// </summary>
-#if NET48
-        public Header Header { get; set; }
-#else
         public Header? Header { get; set; }
-#endif
 
         /// <summary>
         /// Files
         /// </summary>
-#if NET48
-        public FileEntry[] Files { get; set; }
-#else
-        public FileEntry?[]? Files { get; set; }
-#endif
+        public FileEntry[]? Files { get; set; }
     }
 }

BFPK/FileEntry.cs

@@ -14,11 +14,7 @@
         /// <summary>
         /// Name
         /// </summary>
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <summary>
         /// Uncompressed size

BFPK/Header.cs

@@ -1,28 +1,28 @@
-namespace SabreTools.Models.BFPK
+using System.Runtime.InteropServices;
+
+namespace SabreTools.Models.BFPK
 {
     /// <summary>
     /// Header
     /// </summary>
     /// <see cref="https://forum.xentax.com/viewtopic.php?t=5102"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class Header
     {
         /// <summary>
         /// "BFPK"
         /// </summary>
-#if NET48
-        public string Magic { get; set; }
-#else
-        public string? Magic { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
+        public string? Magic;
 
         /// <summary>
         /// Version
         /// </summary>
-        public int Version { get; set; }
+        public int Version;
 
         /// <summary>
         /// Files
         /// </summary>
-        public int Files { get; set; }
+        public int Files;
     }
 }

BMP/BITMAPFILEHEADER.cs

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

BMP/BITMAPINFOHEADER.cs

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

BSP/File.cs

@@ -9,37 +9,21 @@ namespace SabreTools.Models.BSP
         /// <summary>
         /// Header data
         /// </summary>
-#if NET48
-        public Header Header { get; set; }
-#else
         public Header? Header { get; set; }
-#endif
 
         /// <summary>
         /// Lumps
         /// </summary>
-#if NET48
-        public Lump[] Lumps { get; set; }
-#else
         public Lump?[]? Lumps { get; set; }
-#endif
 
         /// <summary>
         /// Texture header data
         /// </summary>
-#if NET48
-        public TextureHeader TextureHeader { get; set; }
-#else
         public TextureHeader? TextureHeader { get; set; }
-#endif
 
         /// <summary>
         /// Textures
         /// </summary>
-#if NET48
-        public Texture[] Textures { get; set; }
-#else
         public Texture?[]? Textures { get; set; }
-#endif
     }
 }

BSP/Header.cs

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

BSP/Lump.cs

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

BSP/Texture.cs

@@ -6,11 +6,7 @@ namespace SabreTools.Models.BSP
         /// <summary>
         /// Name
         /// </summary>
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
     
         /// <summary>
         /// Width
@@ -25,20 +21,12 @@ namespace SabreTools.Models.BSP
         /// <summary>
         /// Offsets
         /// </summary>
-#if NET48
-        public uint[] Offsets { get; set; }
-#else
         public uint[]? Offsets { get; set; }
-#endif
 
         /// <summary>
         /// Texture data
         /// </summary>
-#if NET48
-        public byte[] TextureData { get; set; }
-#else
         public byte[]? TextureData { get; set; }
-#endif
 
         /// <summary>
         /// Palette size
@@ -48,10 +36,6 @@ namespace SabreTools.Models.BSP
         /// <summary>
         /// Palette data
         /// </summary>
-#if NET48
-        public byte[] PaletteData { get; set; }
-#else
         public byte[]? PaletteData { get; set; }
-#endif
     }
 }

BSP/TextureHeader.cs

@@ -11,10 +11,7 @@ namespace SabreTools.Models.BSP
         /// <summary>
         /// Offsets
         /// </summary>
-#if NET48
-        public uint[] Offsets { get; set; }
-#else
+        /// <remarks>TextureCount entries</remarks>
         public uint[]? Offsets { get; set; }
-#endif
     }
 }

CFB/Binary.cs

@@ -12,11 +12,7 @@ namespace SabreTools.Models.CFB
         /// <summary>
         /// Compound file header
         /// </summary>
-#if NET48
-        public FileHeader Header { get; set; }
-#else
         public FileHeader? Header { get; set; }
-#endif
 
         /// <summary>
         /// The FAT is the main allocator for space within a compound file.
@@ -29,11 +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>
-#if NET48
-        public SectorNumber[] FATSectorNumbers { get; set; }
-#else
-        public SectorNumber?[]? FATSectorNumbers { get; set; }
-#endif
+        public SectorNumber[]? FATSectorNumbers { get; set; }
 
         /// <summary>
         /// The mini FAT is used to allocate space in the mini stream.
@@ -46,11 +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>
-#if NET48
-        public SectorNumber[] MiniFATSectorNumbers { get; set; }
-#else
-        public SectorNumber?[]? MiniFATSectorNumbers { get; set; }
-#endif
+        public SectorNumber[]? MiniFATSectorNumbers { get; set; }
 
         /// <summary>
         /// The DIFAT array is used to represent storage of the FAT sectors.
@@ -67,11 +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>
-#if NET48
-        public SectorNumber[] DIFATSectorNumbers { get; set; }
-#else
-        public SectorNumber?[]? DIFATSectorNumbers { get; set; }
-#endif
+        public SectorNumber[]? DIFATSectorNumbers { get; set; }
 
         /// <summary>
         /// The directory entry array is an array of directory entries that
@@ -103,10 +87,6 @@ namespace SabreTools.Models.CFB
         /// all zeroes. The Modified Time field in the root storage directory
         /// entry MAY be all zeroes.
         /// <remarks>
-#if NET48
-        public DirectoryEntry[] DirectoryEntries { get; set; }
-#else
-        public DirectoryEntry?[]? DirectoryEntries { get; set; }
-#endif
+        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>
@@ -16,17 +18,15 @@ namespace SabreTools.Models.CFB
         /// The following characters are illegal and MUST NOT be part of the
         /// name: '/', '\', ':', '!'.
         /// </summary>
-#if NET48
-        public string Name { get; set; }
-#else
-        public string? Name { get; set; }
-#endif
+        /// <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
@@ -34,31 +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
@@ -71,7 +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
@@ -82,7 +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
@@ -92,7 +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
@@ -102,7 +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.
@@ -110,7 +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
@@ -132,6 +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
@@ -45,23 +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>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        /// <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
@@ -70,18 +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
@@ -89,7 +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
@@ -98,38 +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>
-#if NET48
-        public SectorNumber[] DIFAT { get; set; }
-#else
-        public SectorNumber?[]? DIFAT { get; set; }
-#endif
+        /// <remarks>109 entries</remarks>
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 109)]
+        public SectorNumber[]? DIFAT;
     }
 }

CFB/SummaryInformation.cs

@@ -36,11 +36,7 @@ namespace SabreTools.Models.CFB
         /// <summary>
         /// 4 bytes of reserved data
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
         public byte[]? Reserved { get; set; }
-#endif
 
         #endregion
 
@@ -54,11 +50,7 @@ namespace SabreTools.Models.CFB
         /// <summary>
         /// 16 bytes of unknown data
         /// </summary>
-#if NET48
-        public byte[] Unknown { get; set; }
-#else
         public byte[]? Unknown { get; set; }
-#endif
 
         #endregion
 
@@ -83,11 +75,7 @@ namespace SabreTools.Models.CFB
         /// Properties
         /// </summary>
         /// <remarks>Each Variant might be followed by an index and offset value</remarks>
-#if NET48
-        public Variant[] Properties { get; set; }
-#else
-        public Variant?[]? Properties { get; set; }
-#endif
+        public Variant[]? Properties { get; set; }
 
         #endregion
     }

CFB/Variant.cs

@@ -40,10 +40,6 @@ namespace SabreTools.Models.CFB
         /// MUST contain an instance of the type, according to the value
         /// in the <see cref="VariantType"/> field.
         /// </summary>
-#if NET48
-        public object Union { get; set; }
-#else
         public object? Union { get; set; }
-#endif
     }
 }

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/Header.cs

@@ -6,11 +6,7 @@ namespace SabreTools.Models.CHD
         /// <summary>
         /// 'MComprHD'
         /// </summary>
-#if NET48
-        public string Tag { get; set; }
-#else
         public string? Tag { get; set; }
-#endif
 
         /// <summary>
         /// Length of header (including tag and length fields)

CHD/HeaderV1.cs

@@ -41,19 +41,11 @@
         /// <summary>
         /// MD5 checksum of raw data
         /// </summary>
-#if NET48
-        public byte[] MD5 { get; set; } = new byte[16];
-#else
         public byte[]? MD5 { get; set; } = new byte[16];
-#endif
 
         /// <summary>
         /// MD5 checksum of parent file
         /// </summary>
-#if NET48
-        public byte[] ParentMD5 { get; set; } = new byte[16];
-#else
         public byte[]? ParentMD5 { get; set; } = new byte[16];
-#endif
     }
 }

CHD/HeaderV2.cs

@@ -41,20 +41,12 @@
         /// <summary>
         /// MD5 checksum of raw data
         /// </summary>
-#if NET48
-        public byte[] MD5 { get; set; } = new byte[16];
-#else
         public byte[]? MD5 { get; set; } = new byte[16];
-#endif
 
         /// <summary>
         /// MD5 checksum of parent file
         /// </summary>
-#if NET48
-        public byte[] ParentMD5 { get; set; } = new byte[16];
-#else
         public byte[]? ParentMD5 { get; set; } = new byte[16];
-#endif
 
         /// <summary>
         /// Number of bytes per sector

CHD/HeaderV3.cs

@@ -31,20 +31,12 @@
         /// <summary>
         /// MD5 checksum of raw data
         /// </summary>
-#if NET48
-        public byte[] MD5 { get; set; } = new byte[16];
-#else
         public byte[]? MD5 { get; set; } = new byte[16];
-#endif
 
         /// <summary>
         /// MD5 checksum of parent file
         /// </summary>
-#if NET48
-        public byte[] ParentMD5 { get; set; } = new byte[16];
-#else
         public byte[]? ParentMD5 { get; set; } = new byte[16];
-#endif
 
         /// <summary>
         /// Number of bytes per hunk
@@ -54,19 +46,11 @@
         /// <summary>
         /// SHA1 checksum of raw data
         /// </summary>
-#if NET48
-        public byte[] SHA1 { get; set; } = new byte[20];
-#else
         public byte[]? SHA1 { get; set; } = new byte[20];
-#endif
 
         /// <summary>
         /// SHA1 checksum of parent file
         /// </summary>
-#if NET48
-        public byte[] ParentSHA1 { get; set; } = new byte[20];
-#else
         public byte[]? ParentSHA1 { get; set; } = new byte[20];
-#endif
     }
 }

CHD/HeaderV4.cs

@@ -36,28 +36,16 @@
         /// <summary>
         /// Combined raw+meta SHA1
         /// </summary>
-#if NET48
-        public byte[] SHA1 { get; set; } = new byte[20];
-#else
         public byte[]? SHA1 { get; set; } = new byte[20];
-#endif
 
         /// <summary>
         /// Combined raw+meta SHA1 of parent
         /// </summary>
-#if NET48
-        public byte[] ParentSHA1 { get; set; } = new byte[20];
-#else
         public byte[]? ParentSHA1 { get; set; } = new byte[20];
-#endif
 
         /// <summary>
         /// Raw data SHA1
         /// </summary>
-#if NET48
-        public byte[] RawSHA1 { get; set; } = new byte[20];
-#else
         public byte[]? RawSHA1 { get; set; } = new byte[20];
-#endif
     }
 }

CHD/HeaderV5.cs

@@ -36,28 +36,16 @@
         /// <summary>
         /// Raw data SHA1
         /// </summary>
-#if NET48
-        public byte[] RawSHA1 { get; set; }
-#else
         public byte[]? RawSHA1 { get; set; }
-#endif
 
         /// <summary>
         /// Combined raw+meta SHA1
         /// </summary>
-#if NET48
-        public byte[] SHA1 { get; set; }
-#else
         public byte[]? SHA1 { get; set; }
-#endif
 
         /// <summary>
         /// Combined raw+meta SHA1 of parent
         /// </summary>
-#if NET48
-        public byte[] ParentSHA1 { get; set; }
-#else
         public byte[]? ParentSHA1 { get; set; }
-#endif
     }
 }

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;
     }
 }

Charts/SongIni.cs

@@ -12,71 +12,43 @@ namespace SabreTools.Models.Charts
         /// Title of the song.
         /// </summary>
         /// <remarks>name</remarks>
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <summary>
         /// Artist(s) or band(s) behind the song.
         /// </summary>
         /// <remarks>artist</remarks>
-#if NET48
-        public string Artist { get; set; }
-#else
         public string? Artist { get; set; }
-#endif
 
         /// <summary>
         /// Title of the album the song is featured in.
         /// </summary>
         /// <remarks>album</remarks>
-#if NET48
-        public string Album { get; set; }
-#else
         public string? Album { get; set; }
-#endif
 
         /// <summary>
         /// Genre of the song.
         /// </summary>
         /// <remarks>genre</remarks>
-#if NET48
-        public string Genre { get; set; }
-#else
         public string? Genre { get; set; }
-#endif
 
         /// <summary>
         /// Sub-genre for the song.
         /// </summary>
         /// <remarks>sub_genre</remarks>
-#if NET48
-        public string SubGenre { get; set; }
-#else
         public string? SubGenre { get; set; }
-#endif
 
         /// <summary>
         /// Year of the song’s release.
         /// </summary>
         /// <remarks>year</remarks>
-#if NET48
-        public string Year { get; set; }
-#else
         public string? Year { get; set; }
-#endif
 
         /// <summary>
         /// Community member responsible for charting the song.
         /// </summary>
         /// <remarks>charter, frets</remarks>
-#if NET48
-        public string Charter { get; set; }
-#else
         public string? Charter { get; set; }
-#endif
 
         /// <summary>
         /// Version number for the song.
@@ -118,11 +90,7 @@ namespace SabreTools.Models.Charts
         /// Flavor text for this song, usually shown after picking the song or during loading.
         /// </summary>
         /// <remarks>loading_phrase</remarks>
-#if NET48
-        public string LoadingPhrase { get; set; }
-#else
         public string? LoadingPhrase { get; set; }
-#endif
 
         #endregion
 
@@ -132,53 +100,33 @@ namespace SabreTools.Models.Charts
         /// (FoFiX) Hex color to use in the song screen for the cassette.
         /// </summary>
         /// <remarks>cassettecolor</remarks>
-#if NET48
-        public string CassetteColor { get; set; }
-#else
         public string? CassetteColor { get; set; }
-#endif
 
         /// <summary>
         /// (FoFiX) Miscellaneous tags for the chart.
         /// Only known valid value is `cover`.
         /// </summary>
         /// <remarks>tags</remarks>
-#if NET48
-        public string Tags { get; set; }
-#else
         public string? Tags { get; set; }
-#endif
 
         /// <summary>
         /// (PS) Two timestamps in milliseconds for preview start and end time.
         /// Example: `55000 85000`
         /// </summary>
         /// <remarks>preview</remarks>
-#if NET48
-        public long[] Preview { get; set; }
-#else
         public long[]? Preview { get; set; }
-#endif
 
         /// <summary>
         /// (CH) Playlist that the song should show up in.
         /// </summary>
         /// <remarks>playlist</remarks>
-#if NET48
-        public string Playlist { get; set; }
-#else
         public string? Playlist { get; set; }
-#endif
 
         /// <summary>
         /// (CH) Sub-playlist that the song should show up in. 	
         /// </summary>
         /// <remarks>sub_playlist</remarks>
-#if NET48
-        public string SubPlaylist { get; set; }
-#else
         public string? SubPlaylist { get; set; }
-#endif
 
         /// <summary>
         /// (CH) Indicates if this song is a modchart.
@@ -350,51 +298,31 @@ namespace SabreTools.Models.Charts
         /// Specifies a voice type for the singer (either "male" or "female").
         /// </summary>
         /// <remarks>vocal_gender</remarks>
-#if NET48
-        public string VocalGender { get; set; }
-#else
         public string? VocalGender { get; set; }
-#endif
 
         /// <summary>
         /// Specifies a tuning for 17-fret Pro Guitar.
         /// </summary>
         /// <remarks>real_guitar_tuning</remarks>
-#if NET48
-        public string RealGuitarTuning { get; set; }
-#else
         public string? RealGuitarTuning { get; set; }
-#endif
 
         /// <summary>
         /// Specifies a tuning for 22-fret Pro Guitar.
         /// </summary>
         /// <remarks>real_guitar_22_tuning</remarks>
-#if NET48
-        public string RealGuitar22Tuning { get; set; }
-#else
         public string? RealGuitar22Tuning { get; set; }
-#endif
 
         /// <summary>
         /// Specifies a tuning for 17-fret Pro Bass.
         /// </summary>
         /// <remarks>real_bass_tuning</remarks>
-#if NET48
-        public string RealBassTuning { get; set; }
-#else
         public string? RealBassTuning { get; set; }
-#endif
 
         /// <summary>
         /// Specifies a tuning for 22-fret Pro Bass.
         /// </summary>
         /// <remarks>real_bass_22_tuning</remarks>
-#if NET48
-        public string RealBass22Tuning { get; set; }
-#else
         public string? RealBass22Tuning { get; set; }
-#endif
 
         /// <summary>
         /// Specifies the number of lanes for the right hand in Real Keys.
@@ -479,11 +407,7 @@ namespace SabreTools.Models.Charts
         /// Valid values are "none", "half", or "full".
         /// </summary>
         /// <remarks>early_hit_window_size</remarks>
-#if NET48
-        public string EarlyHitWindowSize { get; set; }
-#else
         public string? EarlyHitWindowSize { get; set; }
-#endif
 
         /// <summary>
         /// (CH) Sets whether or not end events in the chart will be respected.
@@ -560,31 +484,19 @@ namespace SabreTools.Models.Charts
         /// Included in either the chart folder or the game the chart was made for, or sourced from this repository of icons.
         /// </summary>
         /// <remarks>icon</remarks>
-#if NET48
-        public string Icon { get; set; }
-#else
         public string? Icon { get; set; }
-#endif
 
         /// <summary>
         /// Name for a background image file.
         /// </summary>
         /// <remarks>background</remarks>
-#if NET48
-        public string Background { get; set; }
-#else
         public string? Background { get; set; }
-#endif
 
         /// <summary>
         /// Name for a background video file.
         /// </summary>
         /// <remarks>video</remarks>
-#if NET48
-        public string Video { get; set; }
-#else
         public string? Video { get; set; }
-#endif
 
         /// <summary>
         /// Name for a background video file.
@@ -610,11 +522,7 @@ namespace SabreTools.Models.Charts
         /// Name for a cover image file.
         /// </summary>
         /// <remarks>cover</remarks>
-#if NET48
-        public string Cover { get; set; }
-#else
         public string? Cover { get; set; }
-#endif
 
         #endregion
 
@@ -624,41 +532,25 @@ namespace SabreTools.Models.Charts
         /// (PS) Name for banner A.
         /// </summary>
         /// <remarks>link_name_a</remarks>
-#if NET48
-        public string LinkNameA { get; set; }
-#else
         public string? LinkNameA { get; set; }
-#endif
 
         /// <summary>
         /// (PS) Name for banner B.
         /// </summary>
         /// <remarks>link_name_b</remarks>
-#if NET48
-        public string LinkNameB { get; set; }
-#else
         public string? LinkNameB { get; set; }
-#endif
 
         /// <summary>
         /// (PS) Link that clicking banner A will open.
         /// </summary>
         /// <remarks>banner_link_a</remarks>
-#if NET48
-        public string BannerLinkA { get; set; }
-#else
         public string? BannerLinkA { get; set; }
-#endif
 
         /// <summary>
         /// (PS) Link that clicking banner B will open.
         /// </summary>
         /// <remarks>banner_link_b</remarks>
-#if NET48
-        public string BannerLinkB { get; set; }
-#else
         public string? BannerLinkB { get; set; }
-#endif
 
         #endregion
 
@@ -668,21 +560,13 @@ namespace SabreTools.Models.Charts
         /// (FoFiX) High score data.
         /// </summary>
         /// <remarks>scores</remarks>
-#if NET48
-        public string Scores { get; set; }
-#else
         public string? Scores { get; set; }
-#endif
 
         /// <summary>
         /// (FoFiX) Additional score data.
         /// </summary>
         /// <remarks>scores_ext</remarks>
-#if NET48
-        public string ScoresExt { get; set; }
-#else
         public string? ScoresExt { get; set; }
-#endif
 
         /// <summary>
         /// (FoFiX) Play count.
@@ -700,31 +584,19 @@ namespace SabreTools.Models.Charts
         /// (FoFiX) Career ID for this song.
         /// </summary>
         /// <remarks>unlock_id</remarks>
-#if NET48
-        public string UnlockId { get; set; }
-#else
         public string? UnlockId { get; set; }
-#endif
 
         /// <summary>
         /// (FoFiX) The career ID that must be completed to unlock this song.
         /// </summary>
         /// <remarks>unlock_require</remarks>
-#if NET48
-        public string UnlockRequire { get; set; }
-#else
         public string? UnlockRequire { get; set; }
-#endif
 
         /// <summary>
         /// (FoFiX) Text to display if the song is locked.
         /// </summary>
         /// <remarks>unlock_text</remarks>
-#if NET48
-        public string UnlockText { get; set; }
-#else
         public string? UnlockText { get; set; }
-#endif
 
         /// <summary>
         /// (FoFiX) Indicates if the song is unlocked.

Charts/TitlesIni.cs

@@ -10,20 +10,12 @@ namespace SabreTools.Models.Charts
         /// A space-separated list of .ini sections to include in the career.
         /// </summary>
         /// <remarks>sections</remarks>
-#if NET48
-        public string[] SectionList { get; set; }
-#else
         public string[]? SectionList { get; set; }
-#endif
 
         /// <summary>
         /// `name` - Display name of the tier.
         /// `unlock_id` - Name used for associating a song with this tier, and for checking unlock requirements.
         /// </summary>
-#if NET48
-        public Dictionary<string, (string Name, string UnlockId)> Sections { get; set; }
-#else
         public Dictionary<string, (string? Name, string? UnlockId)>? Sections { get; set; }
-#endif
     }
 }

ClrMamePro/Archive.cs

@@ -5,20 +5,12 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/BiosSet.cs

@@ -5,35 +5,19 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>description</remarks>
         [Required]
-#if NET48
-        public string Description { get; set; }
-#else
         public string? Description { get; set; }
-#endif
 
         /// <remarks>default</remarks>
-#if NET48
-        public string Default { get; set; }
-#else
         public string? Default { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Chip.cs

@@ -5,42 +5,22 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>type, (cpu|audio)</remarks>
         [Required]
-#if NET48
-        public string Type { get; set; }
-#else
         public string? Type { get; set; }
-#endif
 
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>flags</remarks>
-#if NET48
-        public string Flags { get; set; }
-#else
         public string? Flags { get; set; }
-#endif
 
         /// <remarks>clock, Numeric?</remarks>
-#if NET48
-        public string Clock { get; set; }
-#else
         public string? Clock { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public object[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public object[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/ClrMamePro.cs

@@ -4,118 +4,54 @@ namespace SabreTools.Models.ClrMamePro
     public class ClrMamePro
     {
         /// <remarks>name</remarks>
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>description</remarks>
-#if NET48
-        public string Description { get; set; }
-#else
         public string? Description { get; set; }
-#endif
 
         /// <remarks>rootdir</remarks>
-#if NET48
-        public string RootDir { get; set; }
-#else
         public string? RootDir { get; set; }
-#endif
 
         /// <remarks>category</remarks>
-#if NET48
-        public string Category { get; set; }
-#else
         public string? Category { get; set; }
-#endif
 
         /// <remarks>version</remarks>
-#if NET48
-        public string Version { get; set; }
-#else
         public string? Version { get; set; }
-#endif
 
         /// <remarks>date</remarks>
-#if NET48
-        public string Date { get; set; }
-#else
         public string? Date { get; set; }
-#endif
 
         /// <remarks>author</remarks>
-#if NET48
-        public string Author { get; set; }
-#else
         public string? Author { get; set; }
-#endif
 
         /// <remarks>homepage</remarks>
-#if NET48
-        public string Homepage { get; set; }
-#else
         public string? Homepage { get; set; }
-#endif
 
         /// <remarks>url</remarks>
-#if NET48
-        public string Url { get; set; }
-#else
         public string? Url { get; set; }
-#endif
 
         /// <remarks>comment</remarks>
-#if NET48
-        public string Comment { get; set; }
-#else
         public string? Comment { get; set; }
-#endif
 
         /// <remarks>header</remarks>
-#if NET48
-        public string Header { get; set; }
-#else
         public string? Header { get; set; }
-#endif
 
         /// <remarks>type</remarks>
-#if NET48
-        public string Type { get; set; }
-#else
         public string? Type { get; set; }
-#endif
 
         /// <remarks>forcemerging</remarks>
-#if NET48
-        public string ForceMerging { get; set; }
-#else
         public string? ForceMerging { get; set; }
-#endif
 
         /// <remarks>forcezipping</remarks>
-#if NET48
-        public string ForceZipping { get; set; }
-#else
         public string? ForceZipping { get; set; }
-#endif
 
         /// <remarks>forcepacking</remarks>
-#if NET48
-        public string ForcePacking { get; set; }
-#else
         public string? ForcePacking { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/DipSwitch.cs

@@ -5,34 +5,18 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>entry</remarks>
-#if NET48
-        public string[] Entry { get; set; }
-#else
         public string[]? Entry { get; set; }
-#endif
 
         /// <remarks>default, (yes|no) "no"</remarks>
-#if NET48
-        public string Default { get; set; }
-#else
         public string? Default { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public object[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public object[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Disk.cs

@@ -5,55 +5,27 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>md5</remarks>
-#if NET48
-        public string MD5 { get; set; }
-#else
         public string? MD5 { get; set; }
-#endif
 
         /// <remarks>sha1</remarks>
-#if NET48
-        public string SHA1 { get; set; }
-#else
         public string? SHA1 { get; set; }
-#endif
 
         /// <remarks>merge</remarks>
-#if NET48
-        public string Merge { get; set; }
-#else
         public string? Merge { get; set; }
-#endif
 
         /// <remarks>status</remarks>
-#if NET48
-        public string Status { get; set; }
-#else
         public string? Status { get; set; }
-#endif
 
         /// <remarks>flags</remarks>
-#if NET48
-        public string Flags { get; set; }
-#else
         public string? Flags { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Driver.cs

@@ -5,48 +5,24 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>status, (good|imperfect|preliminary)</remarks>
         [Required]
-#if NET48
-        public string Status { get; set; }
-#else
         public string? Status { get; set; }
-#endif
 
         /// <remarks>color, (good|imperfect|preliminary)</remarks>
-#if NET48
-        public string Color { get; set; }
-#else
         public string? Color { get; set; }
-#endif
 
         /// <remarks>sound, (good|imperfect|preliminary)</remarks>
-#if NET48
-        public string Sound { get; set; }
-#else
         public string? Sound { get; set; }
-#endif
 
         /// <remarks>palettesize, Numeric?</remarks>
-#if NET48
-        public string PaletteSize { get; set; }
-#else
         public string? PaletteSize { get; set; }
-#endif
 
         /// <remarks>blit, (plain|dirty)</remarks>
-#if NET48
-        public string Blit { get; set; }
-#else
         public string? Blit { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public object[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public object[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/GameBase.cs

@@ -7,168 +7,80 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>description</remarks>
-#if NET48
-        public string Description { get; set; }
-#else
         public string? Description { get; set; }
-#endif
 
         /// <remarks>year</remarks>
-#if NET48
-        public string Year { get; set; }
-#else
         public string? Year { get; set; }
-#endif
 
         /// <remarks>manufacturer</remarks>
-#if NET48
-        public string Manufacturer { get; set; }
-#else
         public string? Manufacturer { get; set; }
-#endif
 
         /// <remarks>category</remarks>
-#if NET48
-        public string Category { get; set; }
-#else
         public string? Category { get; set; }
-#endif
 
         /// <remarks>cloneof</remarks>
-#if NET48
-        public string CloneOf { get; set; }
-#else
         public string? CloneOf { get; set; }
-#endif
 
         /// <remarks>romof</remarks>
-#if NET48
-        public string RomOf { get; set; }
-#else
         public string? RomOf { get; set; }
-#endif
 
         /// <remarks>sampleof</remarks>
-#if NET48
-        public string SampleOf { get; set; }
-#else
         public string? SampleOf { get; set; }
-#endif
 
         /// <remarks>release</remarks>
-#if NET48
-        public Release[] Release { get; set; }
-#else
         public Release[]? Release { get; set; }
-#endif
 
         /// <remarks>biosset</remarks>
-#if NET48
-        public BiosSet[] BiosSet { get; set; }
-#else
         public BiosSet[]? BiosSet { get; set; }
-#endif
 
         /// <remarks>rom</remarks>
-#if NET48
-        public Rom[] Rom { get; set; }
-#else
         public Rom[]? Rom { get; set; }
-#endif
 
         /// <remarks>disk</remarks>
-#if NET48
-        public Disk[] Disk { get; set; }
-#else
         public Disk[]? Disk { get; set; }
-#endif
 
         /// <remarks>sample</remarks>
-#if NET48
-        public Sample[] Sample { get; set; }
-#else
         public Sample[]? Sample { get; set; }
-#endif
 
         /// <remarks>archive</remarks>
-#if NET48
-        public Archive[] Archive { get; set; }
-#else
         public Archive[]? Archive { get; set; }
-#endif
 
         #region Aaru Extensions
 
         /// <remarks>media, Appears after Disk</remarks>
-#if NET48
-        public Media[] Media { get; set; }
-#else
         public Media[]? Media { get; set; }
-#endif
 
         #endregion
 
         #region MAME Extensions
 
         /// <remarks>chip, Appears after Archive</remarks>
-#if NET48
-        public Chip[] Chip { get; set; }
-#else
         public Chip[]? Chip { get; set; }
-#endif
 
         /// <remarks>video, Appears after Chip</remarks>
-#if NET48
-        public Video[] Video { get; set; }
-#else
         public Video[]? Video { get; set; }
-#endif
 
         /// <remarks>sound, Appears after Video</remarks>
-#if NET48
-        public Sound Sound { get; set; }
-#else
         public Sound? Sound { get; set; }
-#endif
 
         /// <remarks>input, Appears after Sound</remarks>
-#if NET48
-        public Input Input { get; set; }
-#else
         public Input? Input { get; set; }
-#endif
 
         /// <remarks>dipswitch, Appears after Input</remarks>
-#if NET48
-        public DipSwitch[] DipSwitch { get; set; }
-#else
         public DipSwitch[]? DipSwitch { get; set; }
-#endif
 
         /// <remarks>driver, Appears after DipSwitch</remarks>
-#if NET48
-        public Driver Driver { get; set; }
-#else
         public Driver? Driver { get; set; }
-#endif
 
         #endregion
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Input.cs

@@ -5,56 +5,28 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>players, Numeric/remarks>
         [Required]
-#if NET48
-        public string Players { get; set; }
-#else
         public string? Players { get; set; }
-#endif
 
         /// <remarks>control</remarks>
-#if NET48
-        public string Control { get; set; }
-#else
         public string? Control { get; set; }
-#endif
 
         /// <remarks>buttons, Numeric</remarks>
         [Required]
-#if NET48
-        public string Buttons { get; set; }
-#else
         public string? Buttons { get; set; }
-#endif
 
         /// <remarks>coins, Numeric</remarks>
-#if NET48
-        public string Coins { get; set; }
-#else
         public string? Coins { get; set; }
-#endif
 
         /// <remarks>tilt, (yes|no) "no"</remarks>
-#if NET48
-        public string Tilt { get; set; }
-#else
         public string? Tilt { get; set; }
-#endif
 
         /// <remarks>service, (yes|no) "no"</remarks>
-#if NET48
-        public string Service { get; set; }
-#else
         public string? Service { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public object[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public object[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Media.cs

@@ -5,48 +5,24 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>md5</remarks>
-#if NET48
-        public string MD5 { get; set; }
-#else
         public string? MD5 { get; set; }
-#endif
 
         /// <remarks>sha1</remarks>
-#if NET48
-        public string SHA1 { get; set; }
-#else
         public string? SHA1 { get; set; }
-#endif
 
         /// <remarks>sha256</remarks>
-#if NET48
-        public string SHA256 { get; set; }
-#else
         public string? SHA256 { get; set; }
-#endif
 
         /// <remarks>spamsum</remarks>
-#if NET48
-        public string SpamSum { get; set; }
-#else
         public string? SpamSum { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/MetadataFile.cs

@@ -3,27 +3,15 @@ namespace SabreTools.Models.ClrMamePro
     public class MetadataFile
     {
         /// <remarks>clrmamepro</remarks>
-#if NET48
-        public ClrMamePro ClrMamePro { get; set; }
-#else
         public ClrMamePro? ClrMamePro { get; set; }
-#endif
 
         /// <remarks>game, machine, resource, set</remarks>
-#if NET48
-        public GameBase[] Game { get; set; }
-#else
         public GameBase?[]? Game { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Release.cs

@@ -5,49 +5,25 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>region</remarks>
         [Required]
-#if NET48
-        public string Region { get; set; }
-#else
         public string? Region { get; set; }
-#endif
 
         /// <remarks>language</remarks>
-#if NET48
-        public string Language { get; set; }
-#else
         public string? Language { get; set; }
-#endif
 
         /// <remarks>date</remarks>
-#if NET48
-        public string Date { get; set; }
-#else
         public string? Date { get; set; }
-#endif
 
         /// <remarks>default</remarks>
-#if NET48
-        public string Default { get; set; }
-#else
         public string? Default { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Rom.cs

@@ -5,181 +5,93 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>size, Numeric</remarks>
         [Required]
-#if NET48
-        public string Size { get; set; }
-#else
         public string? Size { get; set; }
-#endif
 
         /// <remarks>crc</remarks>
-#if NET48
-        public string CRC { get; set; }
-#else
         public string? CRC { get; set; }
-#endif
 
         /// <remarks>md5</remarks>
-#if NET48
-        public string MD5 { get; set; }
-#else
         public string? MD5 { get; set; }
-#endif
 
         /// <remarks>sha1</remarks>
-#if NET48
-        public string SHA1 { get; set; }
-#else
         public string? SHA1 { get; set; }
-#endif
 
         /// <remarks>merge</remarks>
-#if NET48
-        public string Merge { get; set; }
-#else
         public string? Merge { get; set; }
-#endif
 
         /// <remarks>status</remarks>
-#if NET48
-        public string Status { get; set; }
-#else
         public string? Status { get; set; }
-#endif
 
         /// <remarks>flags</remarks>
-#if NET48
-        public string Flags { get; set; }
-#else
         public string? Flags { get; set; }
-#endif
 
         /// <remarks>date</remarks>
-#if NET48
-        public string Date { get; set; }
-#else
         public string? Date { get; set; }
-#endif
 
         #region Hash Extensions
 
         /// <remarks>sha256; Also in No-Intro spec; Appears after SHA1</remarks>
-#if NET48
-        public string SHA256 { get; set; }
-#else
         public string? SHA256 { get; set; }
-#endif
 
         /// <remarks>sha384; Appears after SHA256</remarks>
-#if NET48
-        public string SHA384 { get; set; }
-#else
         public string? SHA384 { get; set; }
-#endif
 
         /// <remarks>sha512; Appears after SHA384</remarks>
-#if NET48
-        public string SHA512 { get; set; }
-#else
         public string? SHA512 { get; set; }
-#endif
 
         /// <remarks>spamsum; Appears after SHA512</remarks>
-#if NET48
-        public string SpamSum { get; set; }
-#else
         public string? SpamSum { get; set; }
-#endif
 
         #endregion
 
         #region DiscImgeCreator Extensions
 
         /// <remarks>xxh3_64; Appears after SpamSum</remarks>
-#if NET48
-        public string xxHash364 { get; set; }
-#else
         public string? xxHash364 { get; set; }
-#endif
 
         /// <remarks>xxh3_128; Appears after xxHash364</remarks>
-#if NET48
-        public string xxHash3128 { get; set; }
-#else
         public string? xxHash3128 { get; set; }
-#endif
 
         #endregion
 
         #region MAME Extensions
 
         /// <remarks>region; Appears after Status</remarks>
-#if NET48
-        public string Region { get; set; }
-#else
         public string? Region { get; set; }
-#endif
 
         /// <remarks>offs; Appears after Flags</remarks>
-#if NET48
-        public string Offs { get; set; }
-#else
         public string? Offs { get; set; }
-#endif
 
         #endregion
 
         #region No-Intro Extensions
 
         /// <remarks>serial; Appears after Offs</remarks>
-#if NET48
-        public string Serial { get; set; }
-#else
         public string? Serial { get; set; }
-#endif
 
         /// <remarks>header; Appears after Serial</remarks>
-#if NET48
-        public string Header { get; set; }
-#else
         public string? Header { get; set; }
-#endif
 
         #endregion
 
         #region RomVault Extensions
 
         /// <remarks>inverted; Boolean; Appears after Date</remarks>
-#if NET48
-        public string Inverted { get; set; }
-#else
         public string? Inverted { get; set; }
-#endif
 
         /// <remarks>mia; Boolean; Appears after Inverted</remarks>
-#if NET48
-        public string MIA { get; set; }
-#else
         public string? MIA { get; set; }
-#endif
 
         #endregion
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/RomVault.cs

@@ -4,108 +4,48 @@ namespace SabreTools.Models.ClrMamePro
     public class RomVault
     {
         /// <remarks>name</remarks>
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         /// <remarks>description</remarks>
-#if NET48
-        public string Description { get; set; }
-#else
         public string? Description { get; set; }
-#endif
 
         /// <remarks>rootdir</remarks>
-#if NET48
-        public string RootDir { get; set; }
-#else
         public string? RootDir { get; set; }
-#endif
 
         /// <remarks>category</remarks>
-#if NET48
-        public string Category { get; set; }
-#else
         public string? Category { get; set; }
-#endif
 
         /// <remarks>version</remarks>
-#if NET48
-        public string Version { get; set; }
-#else
         public string? Version { get; set; }
-#endif
 
         /// <remarks>date</remarks>
-#if NET48
-        public string Date { get; set; }
-#else
         public string? Date { get; set; }
-#endif
 
         /// <remarks>author</remarks>
-#if NET48
-        public string Author { get; set; }
-#else
         public string? Author { get; set; }
-#endif
 
         /// <remarks>homepage</remarks>
-#if NET48
-        public string Homepage { get; set; }
-#else
         public string? Homepage { get; set; }
-#endif
 
         /// <remarks>url</remarks>
-#if NET48
-        public string Url { get; set; }
-#else
         public string? Url { get; set; }
-#endif
 
         /// <remarks>comment</remarks>
-#if NET48
-        public string Comment { get; set; }
-#else
         public string? Comment { get; set; }
-#endif
 
         /// <remarks>header</remarks>
-#if NET48
-        public string Header { get; set; }
-#else
         public string? Header { get; set; }
-#endif
 
         /// <remarks>type</remarks>
-#if NET48
-        public string Type { get; set; }
-#else
         public string? Type { get; set; }
-#endif
 
         /// <remarks>forcemerging</remarks>
-#if NET48
-        public string ForceMerging { get; set; }
-#else
         public string? ForceMerging { get; set; }
-#endif
 
         /// <remarks>forcezipping</remarks>
-#if NET48
-        public string ForceZipping { get; set; }
-#else
         public string? ForceZipping { get; set; }
-#endif
 
         /// <remarks>forcepacking</remarks>
-#if NET48
-        public string ForcePacking { get; set; }
-#else
         public string? ForcePacking { get; set; }
-#endif
     }
 }

ClrMamePro/Sample.cs

@@ -5,20 +5,12 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>name</remarks>
         [Required]
-#if NET48
-        public string Name { get; set; }
-#else
         public string? Name { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public string[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public string[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Sound.cs

@@ -5,20 +5,12 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>channels, Numeric?</remarks>
         [Required]
-#if NET48
-        public string Channels { get; set; }
-#else
         public string? Channels { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public object[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public object[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

ClrMamePro/Video.cs

@@ -5,63 +5,31 @@ namespace SabreTools.Models.ClrMamePro
     {
         /// <remarks>screen, (raster|vector)</remarks>
         [Required]
-#if NET48
-        public string Screen { get; set; }
-#else
         public string? Screen { get; set; }
-#endif
 
         /// <remarks>orientation, (vertical|horizontal)</remarks>
         [Required]
-#if NET48
-        public string Orientation { get; set; }
-#else
         public string? Orientation { get; set; }
-#endif
 
         /// <remarks>x, Numeric?</remarks>
-#if NET48
-        public string X { get; set; }
-#else
         public string? X { get; set; }
-#endif
 
         /// <remarks>y, Numeric?</remarks>
-#if NET48
-        public string Y { get; set; }
-#else
         public string? Y { get; set; }
-#endif
 
         /// <remarks>aspectx, Numeric?</remarks>
-#if NET48
-        public string AspectX { get; set; }
-#else
         public string? AspectX { get; set; }
-#endif
 
         /// <remarks>aspecty, Numeric?</remarks>
-#if NET48
-        public string AspectY { get; set; }
-#else
         public string? AspectY { get; set; }
-#endif
 
         /// <remarks>freq, Numeric?</remarks>
-#if NET48
-        public string Freq { get; set; }
-#else
         public string? Freq { get; set; }
-#endif
 
         #region DO NOT USE IN PRODUCTION
 
         /// <remarks>Should be empty</remarks>
-#if NET48
-        public object[] ADDITIONAL_ELEMENTS { get; set; }
-#else
         public object[]? ADDITIONAL_ELEMENTS { get; set; }
-#endif
 
         #endregion
     }

Compression/LZ/FileHeader.cs

@@ -1,21 +1,22 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.Compression.LZ
 {
     /// <summary>
     /// Format of first 14 byte of LZ compressed file
     /// </summary>
     /// <see href="https://github.com/wine-mirror/wine/blob/master/dlls/kernel32/lzexpand.c"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class FileHeaader
     {
-#if NET48
-        public string Magic { get; set; }
-#else
-        public string? Magic { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 8)]
+        public string? Magic;
 
-        public byte CompressionType { get; set; }
+        public byte CompressionType;
 
-        public char LastChar { get; set; }
+        [MarshalAs(UnmanagedType.U1)]
+        public char LastChar;
 
-        public uint RealLength { get; set; }
+        public uint RealLength;
     }
 }

Compression/LZ/State.cs

@@ -7,11 +7,7 @@ namespace SabreTools.Models.Compression.LZ
         /// <summary>
         /// Internal backing stream
         /// </summary>
-#if NET48
-        public Stream Source { get; set; }
-#else
         public Stream? Source { get; set; }
-#endif
 
         /// <summary>
         /// The last char of the filename for replacement
@@ -36,11 +32,7 @@ namespace SabreTools.Models.Compression.LZ
         /// <summary>
         /// The rotating LZ table
         /// </summary>
-#if NET48
-        public byte[] Table { get; set; }
-#else
         public byte[]? Table { get; set; }
-#endif
 
         /// <summary>
         /// CURrent TABle ENTry
@@ -65,11 +57,7 @@ namespace SabreTools.Models.Compression.LZ
         /// <summary>
         /// GETLEN bytes
         /// </summary>
-#if NET48
-        public byte[] Window { get; set; }
-#else
         public byte[]? Window { get; set; }
-#endif
 
         /// <summary>
         /// Current read

Compression/LZX/AlignedOffsetBlockData.cs

@@ -11,80 +11,48 @@ namespace SabreTools.Models.Compression.LZX
         /// Aligned offset tree
         /// </summary>
         /// <remarks>8 elements, 3 bits each</remarks>
-#if NET48
-        public byte[] AlignedOffsetTree { get; set; }
-#else
         public byte[]? AlignedOffsetTree { get; set; }
-#endif
 
         /// <summary>
         /// Pretree for first 256 elements of main tree
         /// </summary>
         /// <remarks>20 elements, 4 bits each</remarks>
-#if NET48
-        public byte[] PretreeFirst256 { get; set; }
-#else
         public byte[]? PretreeFirst256 { get; set; }
-#endif
 
         /// <summary>
         /// Path lengths of first 256 elements of main tree
         /// </summary>
         /// <remarks>Encoded using pretree</remarks>
-#if NET48
-        public int[] PathLengthsFirst256 { get; set; }
-#else
         public int[]? PathLengthsFirst256 { get; set; }
-#endif
 
         /// <summary>
         /// Pretree for remainder of main tree
         /// </summary>
         /// <remarks>20 elements, 4 bits each</remarks>
-#if NET48
-        public byte[] PretreeRemainder { get; set; }
-#else
         public byte[]? PretreeRemainder { get; set; }
-#endif
 
         /// <summary>
         /// Path lengths of remaining elements of main tree
         /// </summary>
         /// <remarks>Encoded using pretree</remarks>
-#if NET48
-        public int[] PathLengthsRemainder { get; set; }
-#else
         public int[]? PathLengthsRemainder { get; set; }
-#endif
 
         /// <summary>
         /// Pretree for length tree
         /// </summary>
         /// <remarks>20 elements, 4 bits each</remarks>
-#if NET48
-        public byte[] PretreeLengthTree { get; set; }
-#else
         public byte[]? PretreeLengthTree { get; set; }
-#endif
 
         /// <summary>
         /// Path lengths of elements in length tree
         /// </summary>
         /// <remarks>Encoded using pretree</remarks>
-#if NET48
-        public int[] PathLengthsLengthTree { get; set; }
-#else
         public int[]? PathLengthsLengthTree { get; set; }
-#endif
 
         /// <summary>
         /// Token sequence (matches and literals)
         /// </summary>
         /// <remarks>Variable</remarks>
-#if NET48
-        public byte[] TokenSequence { get; set; }
-#else
         public byte[]? TokenSequence { get; set; }
-#endif
     }
 }

Compression/LZX/Block.cs

@@ -14,19 +14,11 @@ namespace SabreTools.Models.Compression.LZX
         /// <summary>
         /// Block header
         /// </summary>
-#if NET48
-        public BlockHeader Header { get; set; }
-#else
         public BlockHeader? Header { get; set; }
-#endif
 
         /// <summary>
         /// Block data
         /// </summary>
-#if NET48
-        public BlockData BlockData { get; set; }
-#else
         public BlockData? BlockData { get; set; }
-#endif
     }
 }

Compression/LZX/Chunk.cs

@@ -15,11 +15,11 @@ namespace SabreTools.Models.Compression.LZX
         /// <summary>
         /// Chunk header
         /// </summary>
-        public ChunkHeader Header { get; set; }
+        public ChunkHeader? Header { get; set; }
 
         /// <summary>
         /// Block headers and data
         /// </summary>
-        public Block[] Blocks { get; set; }
+        public Block[]? Blocks { get; set; }
     }
 }

Compression/LZX/UncompressedBlockData.cs

@@ -44,11 +44,7 @@ namespace SabreTools.Models.Compression.LZX
         /// Can use the direct memcpy function, as specified in [IEEE1003.1]
         /// </summary>
         /// <remarks>Encoded directly in the byte stream, not in the bitstream of byte-swapped 16-bit words</remarks>
-#if NET48
-        public byte[] RawDataBytes { get; set; }
-#else
         public byte[]? RawDataBytes { get; set; }
-#endif
 
         /// <summary>
         /// Only if uncompressed size is odd

Compression/LZX/VerbatimBlockData.cs

@@ -10,70 +10,42 @@ namespace SabreTools.Models.Compression.LZX
         /// Pretree for first 256 elements of main tree
         /// </summary>
         /// <remarks>20 elements, 4 bits each</remarks>
-#if NET48
-        public byte[] PretreeFirst256 { get; set; }
-#else
         public byte[]? PretreeFirst256 { get; set; }
-#endif
 
         /// <summary>
         /// Path lengths of first 256 elements of main tree
         /// </summary>
         /// <remarks>Encoded using pretree</remarks>
-#if NET48
-        public int[] PathLengthsFirst256 { get; set; }
-#else
         public int[]? PathLengthsFirst256 { get; set; }
-#endif
 
         /// <summary>
         /// Pretree for remainder of main tree
         /// </summary>
         /// <remarks>20 elements, 4 bits each</remarks>
-#if NET48
-        public byte[] PretreeRemainder { get; set; }
-#else
         public byte[]? PretreeRemainder { get; set; }
-#endif
 
         /// <summary>
         /// Path lengths of remaining elements of main tree
         /// </summary>
         /// <remarks>Encoded using pretree</remarks>
-#if NET48
-        public int[] PathLengthsRemainder { get; set; }
-#else
         public int[]? PathLengthsRemainder { get; set; }
-#endif
 
         /// <summary>
         /// Pretree for length tree
         /// </summary>
         /// <remarks>20 elements, 4 bits each</remarks>
-#if NET48
-        public byte[] PretreeLengthTree { get; set; }
-#else
         public byte[]? PretreeLengthTree { get; set; }
-#endif
 
         /// <summary>
         /// Path lengths of elements in length tree
         /// </summary>
         /// <remarks>Encoded using pretree</remarks>
-#if NET48
-        public int[] PathLengthsLengthTree { get; set; }
-#else
         public int[]? PathLengthsLengthTree { get; set; }
-#endif
 
         /// <summary>
         /// Token sequence (matches and literals)
         /// </summary>
         /// <remarks>Variable</remarks>
-#if NET48
-        public byte[] TokenSequence { get; set; }
-#else
         public byte[]? TokenSequence { get; set; }
-#endif
     }
 }

Compression/MSZIP/Block.cs

@@ -23,19 +23,11 @@ namespace SabreTools.Models.Compression.MSZIP
         /// <summary>
         /// Block header
         /// </summary>
-#if NET48
-        public BlockHeader BlockHeader { get; set; }
-#else
         public BlockHeader? BlockHeader { get; set; }
-#endif
 
         /// <summary>
         /// Compressed blocks
         /// </summary>
-#if NET48
-        public DeflateBlock[] CompressedBlocks { get; set; }
-#else
         public DeflateBlock[]? CompressedBlocks { get; set; }
-#endif
     }
 }

Compression/MSZIP/CompressedBlockHeader.cs

@@ -10,19 +10,11 @@ namespace SabreTools.Models.Compression.MSZIP
         /// <summary>
         /// Huffman code lengths for the literal / length alphabet
         /// </summary>
-#if NET48
-        public virtual uint[] LiteralLengths { get; set; }
-#else
         public virtual uint[]? LiteralLengths { get; set; }
-#endif
 
         /// <summary>
         /// Huffman distance codes for the literal / length alphabet
         /// </summary>
-#if NET48
-        public virtual uint[] DistanceCodes { get; set; }
-#else
         public virtual uint[]? DistanceCodes { get; set; }
-#endif
     }
 }

Compression/MSZIP/DeflateBlock.cs

@@ -15,20 +15,12 @@ namespace SabreTools.Models.Compression.MSZIP
         /// <summary>
         /// Deflate block (RFC-1951) header
         /// </summary>
-#if NET48
-        public DeflateBlockHeader Header { get; set; }
-#else
         public DeflateBlockHeader? Header { get; set; }
-#endif
 
         /// <summary>
         /// Compression-specific data header
         /// </summary>
-#if NET48
-        public DataHeader DataHeader { get; set; }
-#else
         public DataHeader? DataHeader { get; set; }
-#endif
 
         /// <summary>
         /// MSZIP data
@@ -38,10 +30,6 @@ namespace SabreTools.Models.Compression.MSZIP
         /// compressed or uncompressed data. Keep this in mind when using the built
         /// versions of this model.
         /// </remarks>
-#if NET48
-        public byte[] Data { get; set; }
-#else
         public byte[]? Data { get; set; }
-#endif
     }
 }

Compression/MSZIP/FixedCompressedDataHeader.cs

@@ -14,11 +14,7 @@ namespace SabreTools.Models.Compression.MSZIP
         /// <summary>
         /// Huffman code lengths for the literal / length alphabet
         /// </summary>
-#if NET48
-        public override uint[] LiteralLengths
-#else
         public override uint[]? LiteralLengths
-#endif
         {
             get
             {
@@ -56,11 +52,7 @@ namespace SabreTools.Models.Compression.MSZIP
         /// <summary>
         /// Huffman distance codes for the literal / length alphabet
         /// </summary>
-#if NET48
-        public override uint[] DistanceCodes
-#else
         public override uint[]? DistanceCodes
-#endif
         {
             get
             {
@@ -90,20 +82,12 @@ namespace SabreTools.Models.Compression.MSZIP
         /// <summary>
         /// Huffman code lengths for the literal / length alphabet
         /// </summary>
-#if NET48
-        private uint[] _literalLengths = null;
-#else
         private uint[]? _literalLengths = null;
-#endif
 
         /// <summary>
         /// Huffman distance codes for the literal / length alphabet
         /// </summary>
-#if NET48
-        private uint[] _distanceCodes = null;
-#else
         private uint[]? _distanceCodes = null;
-#endif
 
         #endregion
     }

Compression/Quantum/Model.cs

@@ -10,11 +10,7 @@ namespace SabreTools.Models.Compression.Quantum
         /// order in the table, and with every symbol in the table
         /// having a frequency of 1
         /// </remarks>
-#if NET48
-        public ModelSymbol[] Symbols { get; set; }
-#else
         public ModelSymbol?[]? Symbols { get; set; }
-#endif
 
         /// <remarks>
         /// The initial total frequency is equal to the number of entries

CueSheets/CueFile.cs

@@ -15,11 +15,7 @@ namespace SabreTools.Models.CueSheets
         /// <summary>
         /// filename
         /// </summary>
-#if NET48
-        public string FileName { get; set; }
-#else
         public string? FileName { get; set; }
-#endif
 
         /// <summary>
         /// filetype
@@ -29,10 +25,6 @@ namespace SabreTools.Models.CueSheets
         /// <summary>
         /// List of TRACK in FILE
         /// </summary>
-#if NET48
-        public CueTrack[] Tracks { get; set; }
-#else
         public CueTrack?[]? Tracks { get; set; }
-#endif
     }
 }

CueSheets/CueSheet.cs

@@ -11,55 +11,31 @@ namespace SabreTools.Models.CueSheets
         /// <summary>
         /// CATALOG
         /// </summary>
-#if NET48
-        public string Catalog { get; set; }
-#else
         public string? Catalog { get; set; }
-#endif
 
         /// <summary>
         /// CDTEXTFILE
         /// </summary>
-#if NET48
-        public string CdTextFile { get; set; }
-#else
         public string? CdTextFile { get; set; }
-#endif
 
         /// <summary>
         /// PERFORMER
         /// </summary>
-#if NET48
-        public string Performer { get; set; }
-#else
         public string? Performer { get; set; }
-#endif
 
         /// <summary>
         /// SONGWRITER
         /// </summary>
-#if NET48
-        public string Songwriter { get; set; }
-#else
         public string? Songwriter { get; set; }
-#endif
 
         /// <summary>
         /// TITLE
         /// </summary>
-#if NET48
-        public string Title { get; set; }
-#else
         public string? Title { get; set; }
-#endif
 
         /// <summary>
         /// List of FILE in cuesheet
         /// </summary>
-#if NET48
-        public CueFile[] Files { get; set; }
-#else
         public CueFile?[]? Files { get; set; }
-#endif
     }
 }

CueSheets/CueTrack.cs

@@ -27,65 +27,37 @@ namespace SabreTools.Models.CueSheets
         /// ISRC
         /// </summary>
         /// <remarks>12 characters in length</remarks>
-#if NET48
-        public string ISRC { get; set; }
-#else
         public string? ISRC { get; set; }
-#endif
 
         /// <summary>
         /// PERFORMER
         /// </summary>
-#if NET48
-        public string Performer { get; set; }
-#else
         public string? Performer { get; set; }
-#endif
 
         /// <summary>
         /// SONGWRITER
         /// </summary>
-#if NET48
-        public string Songwriter { get; set; }
-#else
         public string? Songwriter { get; set; }
-#endif
 
         /// <summary>
         /// TITLE
         /// </summary>
-#if NET48
-        public string Title { get; set; }
-#else
         public string? Title { get; set; }
-#endif
 
         /// <summary>
         /// PREGAP
         /// </summary>
-#if NET48
-        public PreGap PreGap { get; set; }
-#else
         public PreGap? PreGap { get; set; }
-#endif
 
         /// <summary>
         /// List of INDEX in TRACK
         /// </summary>
         /// <remarks>Must start with 0 or 1 and then sequential</remarks>
-#if NET48
-        public CueIndex[] Indices { get; set; }
-#else
         public CueIndex?[]? Indices { get; set; }
-#endif
 
         /// <summary>
         /// POSTGAP
         /// </summary>
-#if NET48
-        public PostGap PostGap { get; set; }
-#else
         public PostGap? PostGap { get; set; }
-#endif
     }
 }

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>
@@ -11,11 +11,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Reserved
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        public ushort Reserved { get; set; }
 
         /// <summary>
         /// End address (last byte of last VTS_ATRT)
@@ -25,19 +21,12 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Offset to VTS_ATRT n
         /// </summary>
-#if NET48
-        public uint[] Offsets { get; set; }
-#else
+        /// <remarks>NumberOfTitleSets entries</remarks>
         public uint[]? Offsets { get; set; }
-#endif
 
         /// <summary>
         /// Entries
         /// </summary>
-#if NET48
-        public AudioSubPictureAttributesTableEntry[] Entries { get; set; }
-#else
-        public AudioSubPictureAttributesTableEntry?[]? Entries { get; set; }
-#endif
+        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>
@@ -18,10 +18,6 @@ namespace SabreTools.Models.DVD
         /// Copy of VTS attributes (offset 100 and on from the VTS IFO
         /// file, usually 0x300 bytes long)
         /// </summary>
-#if NET48
-        public byte[] AttributesCopy { get; set; }
-#else
         public byte[]? AttributesCopy { get; set; }
-#endif
     }
 }

DVD/CellAddressTable.cs

@@ -11,11 +11,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Reserved
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        public ushort Reserved { get; set; }
 
         /// <summary>
         /// End address (last byte of last entry)
@@ -25,10 +21,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// 12-byte entries
         /// </summary>
-#if NET48
-        public CellAddressTableEntry[] Entries { get; set; }
-#else
-        public CellAddressTableEntry?[]? Entries { get; set; }
-#endif
+        /// <remarks>NumberOfVOBIDs entries</remarks>
+        public CellAddressTableEntry[]? Entries { get; set; }
     }
 }

DVD/CellAddressTableEntry.cs

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

DVD/LanguageUnitTable.cs

@@ -11,11 +11,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Reserved
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        public ushort Reserved { get; set; }
 
         /// <summary>
         /// End address (last byte of last PGC in last LU)
@@ -26,19 +22,13 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Language Units
         /// </summary>
-#if NET48
-        public LanguageUnitTableEntry[] Entries { get; set; }
-#else
-        public LanguageUnitTableEntry?[]? Entries { get; set; }
-#endif
+        /// <remarks>NumberOfVOBIDs entries</remarks>
+        public LanguageUnitTableEntry[]? Entries { get; set; }
 
         /// <summary>
         /// Program Chains
         /// </summary>
-#if NET48
-        public ProgramChainTable[] ProgramChains { get; set; }
-#else
-        public ProgramChainTable?[]? ProgramChains { get; set; }
-#endif
+        /// <remarks>NumberOfVOBIDs entries</remarks>
+        public ProgramChainTable[]? ProgramChains { get; set; }
     }
 }

DVD/LanguageUnitTableEntry.cs

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

DVD/ParentalManagementMasksTable.cs

@@ -25,21 +25,13 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Entries
         /// </summary>
-#if NET48
-        public ParentalManagementMasksTableEntry[] Entries { get; set; }
-#else
-        public ParentalManagementMasksTableEntry?[]? Entries { get; set; }
-#endif
+        public ParentalManagementMasksTableEntry[]? Entries { get; set; }
 
         /// <summary>
         /// The PTL_MAIT contains the 16-bit masks for the VMG and
         /// all title sets for parental management level 8 followed
         /// by the masks for level 7, and so on to level 1.
         /// </summary>
-#if NET48
-        public byte[][] BitMasks { get; set; }
-#else
         public byte[][]? BitMasks { get; set; }
-#endif
     }
 }

DVD/ParentalManagementMasksTableEntry.cs

@@ -1,25 +1,24 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo_vmg.html"/>
+    [StructLayout(LayoutKind.Sequential)]
     public sealed class ParentalManagementMasksTableEntry
     {
         /// <summary>
         /// Country code
         /// </summary>
-        public ushort CountryCode { get; set; }
+        public ushort CountryCode;
 
         /// <summary>
         /// Reserved
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        public ushort Reserved;
 
         /// <summary>
         /// Offset to PTL_MAIT
         /// </summary>
-        public uint Offset { get; set; }
+        public uint Offset;
     }
 }

DVD/ProgramChainTable.cs

@@ -11,11 +11,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Reserved
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        public ushort Reserved { get; set; }
 
         /// <summary>
         /// End address (last byte of last PGC in this LU)
@@ -26,10 +22,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Program Chains
         /// </summary>
-#if NET48
-        public ProgramChainTableEntry[] Entries { get; set; }
-#else
-        public ProgramChainTableEntry?[]? Entries { get; set; }
-#endif
+        /// <remarks>NumberOfProgramChains entries</remarks>
+        public ProgramChainTableEntry[]? Entries { get; set; }
     }
 }

DVD/ProgramChainTableEntry.cs

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

DVD/TitlesTable.cs

@@ -11,11 +11,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Reserved
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        public ushort Reserved { get; set; }
 
         /// <summary>
         /// End address (last byte of last entry)
@@ -25,10 +21,7 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// 12-byte entries
         /// </summary>
-#if NET48
-        public TitlesTableEntry[] Entries { get; set; }
-#else
-        public TitlesTableEntry?[]? Entries { get; set; }
-#endif
+        /// <remarks>NumberOfTitles entries</remarks>
+        public TitlesTableEntry[]? Entries { get; set; }
     }
 }

DVD/TitlesTableEntry.cs

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

DVD/VOBUAddressMap.cs

@@ -11,10 +11,6 @@ namespace SabreTools.Models.DVD
         /// <summary>
         /// Starting sector within VOB of nth VOBU
         /// </summary>
-#if NET48
-        public uint[] StartingSectors { get; set; }
-#else
         public uint[]? StartingSectors { get; set; }
-#endif
     }
 }

DVD/VideoManagerIFO.cs

@@ -1,26 +1,26 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo.html"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class VideoManagerIFO
     {
         /// <summary>
         /// "DVDVIDEO-VMG"
         /// </summary>
-#if NET48
-        public string Signature { get; set; }
-#else
-        public string? Signature { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 12)]
+        public string? Signature;
 
         /// <summary>
         /// Last sector of VMG set (last sector of BUP)
         /// </summary>
-        public uint LastVMGSetSector { get; set; }
+        public uint LastVMGSetSector;
 
         /// <summary>
         /// Last sector of IFO
         /// </summary>
-        public uint LastIFOSector { get; set; }
+        public uint LastIFOSector;
 
         /// <summary>
         /// Version number
@@ -28,151 +28,132 @@ namespace SabreTools.Models.DVD
         /// - Byte 1, Bits 7-4 - Major version number
         /// - Byte 1, Bits 3-0 - Minor version number
         /// </summary>
-        public ushort VersionNumber { get; set; }
+        public ushort VersionNumber;
 
         /// <summary>
         /// VMG category
         /// </summary>
         /// <remarks>byte1=prohibited region mask</remarks>
-        public uint VMGCategory { get; set; }
+        public uint VMGCategory;
 
         /// <summary>
         /// Number of volumes
         /// </summary>
-        public ushort NumberOfVolumes { get; set; }
+        public ushort NumberOfVolumes;
 
         /// <summary>
         /// Volume number
         /// </summary>
-        public ushort VolumeNumber { get; set; }
+        public ushort VolumeNumber;
 
         /// <summary>
         /// Side ID
         /// </summary>
-        public byte SideID { get; set; }
+        public byte SideID;
 
         /// <summary>
         /// Number of title sets
         /// </summary>
-        public ushort NumberOfTitleSets { get; set; }
+        public ushort NumberOfTitleSets;
 
         /// <summary>
         /// Provider ID
         /// </summary>
-#if NET48
-        public byte[] ProviderID { get; set; }
-#else
-        public byte[]? ProviderID { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
+        public byte[]? ProviderID;
 
         /// <summary>
         /// VMG POS
         /// </summary>
-        public ulong VMGPOS { get; set; }
+        public ulong VMGPOS;
 
         /// <summary>
         /// End byte address of VMGI_MAT
         /// </summary>
-        public uint InformationManagementTableEndByteAddress { get; set; }
+        public uint InformationManagementTableEndByteAddress;
 
         /// <summary>
         /// Start address of FP_PGC (First Play program chain)
         /// </summary>
-        public uint FirstPlayProgramChainStartAddress { get; set; }
+        public uint FirstPlayProgramChainStartAddress;
 
         /// <summary>
         /// Start sector of Menu VOB
         /// </summary>
-        public uint MenuVOBStartSector { get; set; }
+        public uint MenuVOBStartSector;
 
         /// <summary>
         /// Sector pointer to TT_SRPT (table of titles)
         /// </summary>
-        public uint TableOfTitlesSectorPointer { get; set; }
+        public uint TableOfTitlesSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMGM_PGCI_UT (Menu Program Chain table)
         /// </summary>
-        public uint MenuProgramChainTableSectorPointer { get; set; }
+        public uint MenuProgramChainTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMG_PTL_MAIT (Parental Management masks)
         /// </summary>
-        public uint ParentalManagementMasksSectorPointer { get; set; }
+        public uint ParentalManagementMasksSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMG_VTS_ATRT (copies of VTS audio/sub-picture attributes)
         /// </summary>
-        public uint AudioSubPictureAttributesSectorPointer { get; set; }
+        public uint AudioSubPictureAttributesSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMG_TXTDT_MG (text data)
         /// </summary>
-        public uint TextDataSectorPointer { get; set; }
+        public uint TextDataSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMGM_C_ADT (menu cell address table)
         /// </summary>
-        public uint MenuCellAddressTableSectorPointer { get; set; }
+        public uint MenuCellAddressTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VMGM_VOBU_ADMAP (menu VOBU address map)
         /// </summary>
-        public uint MenuVOBUAddressMapSectorPointer { get; set; }
+        public uint MenuVOBUAddressMapSectorPointer;
 
         /// <summary>
         /// Video attributes of VMGM_VOBS
         /// </summary>
-#if NET48
-        public byte[] VideoAttributes { get; set; }
-#else
-        public byte[]? VideoAttributes { get; set; }
-#endif
+        public ushort VideoAttributes;
 
         /// <summary>
         /// Number of audio streams in VMGM_VOBS
         /// </summary>
-        public ushort NumberOfAudioStreams { get; set; }
+        public ushort NumberOfAudioStreams;
 
         /// <summary>
         /// Audio attributes of VMGM_VOBS
         /// </summary>
-#if NET48
-        public byte[][] AudioAttributes { get; set; }
-#else
-        public byte[][]? AudioAttributes { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public ulong[]? AudioAttributes;
 
         /// <summary>
         /// Unknown
         /// </summary>
-#if NET48
-        public byte[] Unknown { get; set; }
-#else
-        public byte[]? Unknown { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+        public byte[]? Unknown;
 
         /// <summary>
         /// Number of subpicture streams in VMGM_VOBS (0 or 1)
         /// </summary>
-        public ushort NumberOfSubpictureStreams { get; set; }
+        public ushort NumberOfSubpictureStreams;
 
         /// <summary>
         /// Subpicture attributes of VMGM_VOBS
         /// </summary>
-#if NET48
-        public byte[] SubpictureAttributes { get; set; }
-#else
-        public byte[]? SubpictureAttributes { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? SubpictureAttributes;
 
         /// <summary>
         /// Reserved
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 164)]
+        public byte[]? Reserved;
     }
 }

DVD/VideoTitleSetIFO.cs

@@ -1,26 +1,26 @@
+using System.Runtime.InteropServices;
+
 namespace SabreTools.Models.DVD
 {
     /// <see href="https://dvd.sourceforge.net/dvdinfo/ifo.html"/>
+    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
     public sealed class VideoTitleSetIFO
     {
         /// <summary>
         /// "DVDVIDEO-VTS"
         /// </summary>
-#if NET48
-        public string Signature { get; set; }
-#else
-        public string? Signature { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 12)]
+        public string? Signature;
 
         /// <summary>
         /// Last sector of title set (last sector of BUP)
         /// </summary>
-        public uint LastTitleSetSector { get; set; }
+        public uint LastTitleSetSector;
 
         /// <summary>
         /// Last sector of IFO
         /// </summary>
-        public uint LastIFOSector { get; set; }
+        public uint LastIFOSector;
 
         /// <summary>
         /// Version number
@@ -28,161 +28,142 @@ namespace SabreTools.Models.DVD
         /// - Byte 1, Bits 7-4 - Major version number
         /// - Byte 1, Bits 3-0 - Minor version number
         /// </summary>
-        public ushort VersionNumber { get; set; }
+        public ushort VersionNumber;
 
         /// <summary>
         /// VTS category
         /// </summary>
         /// <remarks>0=unspecified, 1=Karaoke</remarks>
-        public uint VMGCategory { get; set; }
+        public uint VMGCategory;
 
         /// <summary>
         /// Number of volumes
         /// </summary>
-        public ushort NumberOfVolumes { get; set; }
+        public ushort NumberOfVolumes;
 
         /// <summary>
         /// Volume number
         /// </summary>
-        public ushort VolumeNumber { get; set; }
+        public ushort VolumeNumber;
 
         /// <summary>
         /// Side ID
         /// </summary>
-        public byte SideID { get; set; }
+        public byte SideID;
 
         /// <summary>
         /// Number of title sets
         /// </summary>
-        public ushort NumberOfTitleSets { get; set; }
+        public ushort NumberOfTitleSets;
 
         /// <summary>
         /// Provider ID
         /// </summary>
-#if NET48
-        public byte[] ProviderID { get; set; }
-#else
-        public byte[]? ProviderID { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
+        public byte[]? ProviderID;
 
         /// <summary>
         /// VMG POS
         /// </summary>
-        public ulong VMGPOS { get; set; }
+        public ulong VMGPOS;
 
         /// <summary>
         /// End byte address of VTS_MAT
         /// </summary>
-        public uint InformationManagementTableEndByteAddress { get; set; }
+        public uint InformationManagementTableEndByteAddress;
 
         /// <summary>
         /// Start address of FP_PGC (First Play program chain)
         /// </summary>
-        public uint FirstPlayProgramChainStartAddress { get; set; }
+        public uint FirstPlayProgramChainStartAddress;
 
         /// <summary>
         /// Start sector of Menu VOB
         /// </summary>
-        public uint MenuVOBStartSector { get; set; }
+        public uint MenuVOBStartSector;
 
         /// <summary>
         /// Start sector of Title VOB
         /// </summary>
-        public uint TitleVOBStartSector { get; set; }
+        public uint TitleVOBStartSector;
 
         /// <summary>
         /// Sector pointer to VTS_PTT_SRPT (table of Titles and Chapters)
         /// </summary>
-        public uint TableOfTitlesAndChaptersSectorPointer { get; set; }
+        public uint TableOfTitlesAndChaptersSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTS_PGCI (Title Program Chain table)
         /// </summary>
-        public uint TitleProgramChainTableSectorPointer { get; set; }
+        public uint TitleProgramChainTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTSM_PGCI_UT (Menu Program Chain table)
         /// </summary>
-        public uint MenuProgramChainTableSectorPointer { get; set; }
+        public uint MenuProgramChainTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTS_TMAPTI (time map)
         /// </summary>
-        public uint TimeMapSectorPointer { get; set; }
+        public uint TimeMapSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTSM_C_ADT (menu cell address table)
         /// </summary>
-        public uint MenuCellAddressTableSectorPointer { get; set; }
+        public uint MenuCellAddressTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTSM_VOBU_ADMAP (menu VOBU address map)
         /// </summary>
-        public uint MenuVOBUAddressMapSectorPointer { get; set; }
+        public uint MenuVOBUAddressMapSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTS_C_ADT (title set cell address table)
         /// </summary>
-        public uint TitleSetCellAddressTableSectorPointer { get; set; }
+        public uint TitleSetCellAddressTableSectorPointer;
 
         /// <summary>
         /// Sector pointer to VTS_VOBU_ADMAP (title set VOBU address map)
         /// </summary>
-        public uint TitleSetVOBUAddressMapSectorPointer { get; set; }
+        public uint TitleSetVOBUAddressMapSectorPointer;
 
         /// <summary>
         /// Video attributes of VTSM_VOBS
         /// </summary>
-#if NET48
-        public byte[] VideoAttributes { get; set; }
-#else
-        public byte[]? VideoAttributes { get; set; }
-#endif
+        public ushort VideoAttributes;
 
         /// <summary>
         /// Number of audio streams in VTSM_VOBS
         /// </summary>
-        public ushort NumberOfAudioStreams { get; set; }
+        public ushort NumberOfAudioStreams;
 
         /// <summary>
         /// Audio attributes of VTSM_VOBS
         /// </summary>
-#if NET48
-        public byte[][] AudioAttributes { get; set; }
-#else
-        public byte[][]? AudioAttributes { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)]
+        public ulong[]? AudioAttributes;
 
         /// <summary>
         /// Unknown
         /// </summary>
-#if NET48
-        public byte[] Unknown { get; set; }
-#else
-        public byte[]? Unknown { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
+        public byte[]? Unknown;
 
         /// <summary>
         /// Number of subpicture streams in VTSM_VOBS (0 or 1)
         /// </summary>
-        public ushort NumberOfSubpictureStreams { get; set; }
+        public ushort NumberOfSubpictureStreams;
 
         /// <summary>
         /// Subpicture attributes of VTSM_VOBS
         /// </summary>
-#if NET48
-        public byte[] SubpictureAttributes { get; set; }
-#else
-        public byte[]? SubpictureAttributes { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
+        public byte[]? SubpictureAttributes;
 
         /// <summary>
         /// Reserved
         /// </summary>
-#if NET48
-        public byte[] Reserved { get; set; }
-#else
-        public byte[]? Reserved { get; set; }
-#endif
+        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 164)]
+        public byte[]? Reserved;
     }
 }

Delphi/Constants.cs

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

Delphi/PackageInfoTable.cs

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

Delphi/PackageTypeInfo.cs

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

Delphi/PackageUnitEntry.cs

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