bump version

Bumps [NUnit](https://github.com/nunit/nunit) from 3.13.2 to 3.13.3.
- [Release notes](https://github.com/nunit/nunit/releases)
- [Changelog](https://github.com/nunit/nunit/blob/v3.13.3/CHANGES.md)
- [Commits](https://github.com/nunit/nunit/compare/v3.13.2...v3.13.3)

---
updated-dependencies:
- dependency-name: NUnit
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/dependabot.yml

@@ -0,0 +1,18 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "nuget" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"
+
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/dotnet.yml

@@ -0,0 +1,44 @@
+name: .NET
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  net6:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v2
+      with:
+        dotnet-version: 6.0.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --framework net6.0 --no-restore
+    - name: Test
+      run: dotnet test --framework net6.0 --no-build --verbosity normal
+
+  net5:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Setup .NET
+      uses: actions/setup-dotnet@v2
+      with:
+        dotnet-version: | 
+            5.0.x
+            6.0.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --framework net5.0 --no-restore
+    - name: Test
+      run: dotnet test --framework net5.0 --no-build --verbosity normal

VersionUtilities.Tests/ComparisonTests.cs

@@ -0,0 +1,53 @@
+using NUnit.Framework;
+
+namespace AssetRipper.VersionUtilities.Tests
+{
+	public class ComparisonTests
+	{
+		private static readonly UnityVersion lowValue = new UnityVersion(2017, 3, 0, UnityVersionType.Patch, 1);
+		private static readonly UnityVersion mediumValue = new UnityVersion(2019, 4, 3, UnityVersionType.Final, 1);
+		private static readonly UnityVersion highValue = new UnityVersion(2020, 2, 0, UnityVersionType.Final, 1);
+
+		[Test]
+		public void LessThanIsTransitive()
+		{
+			Assert.IsTrue(lowValue < mediumValue);
+			Assert.IsTrue(mediumValue < highValue);
+			Assert.IsTrue(lowValue < highValue);
+		}
+
+		[Test]
+		public void GreaterThanIsTransitive()
+		{
+			Assert.IsTrue(mediumValue > lowValue);
+			Assert.IsTrue(highValue > mediumValue);
+			Assert.IsTrue(highValue > lowValue);
+		}
+
+		[Test]
+		public void WeakInequalityHolds()
+		{
+			UnityVersion low = lowValue;
+			Assert.IsTrue(lowValue <= low);
+		}
+
+		[Test]
+		public void MinimumValueDefinition()
+		{
+			Assert.IsTrue(UnityVersion.MinVersion == new UnityVersion(ushort.MinValue, ushort.MinValue, ushort.MinValue, UnityVersionType.Alpha, byte.MinValue));
+		}
+
+		[Test]
+		public void MaximumValueDefinition()
+		{
+			Assert.IsTrue(UnityVersion.MaxVersion == new UnityVersion(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, (UnityVersionType)byte.MaxValue, byte.MaxValue));
+		}
+
+		[Test]
+		public void AnIncreaseOfTypeNumberMakesInequal()
+		{
+			Assert.IsTrue(UnityVersion.MinVersion < new UnityVersion(ushort.MinValue, ushort.MinValue, ushort.MinValue, UnityVersionType.Alpha, 1));
+			Assert.IsTrue(lowValue < new UnityVersion(lowValue.Major, lowValue.Minor, lowValue.Build, lowValue.Type, (byte)(lowValue.TypeNumber + 1)));
+		}
+	}
+}

VersionUtilities.Tests/DistanceTests.cs

@@ -0,0 +1,47 @@
+using NUnit.Framework;
+
+namespace AssetRipper.VersionUtilities.Tests
+{
+	public class DistanceTests
+	{
+		private static readonly UnityVersion version3 = new UnityVersion(3, 0, 0, UnityVersionType.Final, 1);
+		private static readonly UnityVersion version4 = new UnityVersion(4, 4, 0, UnityVersionType.Alpha, 1);
+		private static readonly UnityVersion version5 = new UnityVersion(5, 6, 1, UnityVersionType.Final, 11);
+		private static readonly UnityVersion version6 = new UnityVersion(6, 0, 0, UnityVersionType.Final, 1);
+		private static readonly UnityVersion version7 = new UnityVersion(7, 0, 0, UnityVersionType.Final, 1);
+		private static readonly UnityVersion version8 = new UnityVersion(8, 0, 0, UnityVersionType.Final, 1);
+		private static readonly UnityVersion version9 = new UnityVersion(9, 0, 0, UnityVersionType.Final, 1);
+		private static readonly UnityVersion[] versionArray = new UnityVersion[] { version3, version4, version5, version6, version7, version8, version9 };
+
+		[Test]
+		public void DistanceFunctionIsSymmetric()
+		{
+			ulong distance1 = UnityVersion.Distance(version4, version5);
+			ulong distance2 = UnityVersion.Distance(version5, version4);
+			Assert.IsTrue(distance1 == distance2);
+		}
+
+		[Test]
+		public void DistanceIsZeroForEquivalentVersions()
+		{
+			ulong distance = UnityVersion.Distance(version4, version4);
+			Assert.IsTrue(distance == 0);
+		}
+
+		[Test]
+		public void CorrectlyReturnsVersion6()
+		{
+			UnityVersion version = new UnityVersion(6, 1);
+			UnityVersion closest = version.GetClosestVersion(versionArray);
+			Assert.IsTrue(closest == version6);
+		}
+
+		[Test]
+		public void CorrectlyReturnsVersion5()
+		{
+			UnityVersion version = new UnityVersion(5, 4, 9);
+			UnityVersion closest = version.GetClosestVersion(versionArray);
+			Assert.IsTrue(closest == version5);
+		}
+	}
+}

VersionUtilities.Tests/VersionUtilities.Tests.csproj

@@ -11,10 +11,10 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-		<PackageReference Include="NUnit" Version="3.13.1" />
-		<PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
-		<PackageReference Include="coverlet.collector" Version="3.0.2" />
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
+		<PackageReference Include="NUnit" Version="3.13.3" />
+		<PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
+		<PackageReference Include="coverlet.collector" Version="3.1.2" />
 	</ItemGroup>
 
 	<ItemGroup>

VersionUtilities.sln

@@ -19,6 +19,11 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Licenses", "Licenses", "{4B
 		Licenses\uTinyRipper.md = Licenses\uTinyRipper.md
 	EndProjectSection
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Workflows", "Workflows", "{B63714DC-6258-4032-9930-DFF0667624BC}"
+	ProjectSection(SolutionItems) = preProject
+		.github\workflows\dotnet.yml = .github\workflows\dotnet.yml
+	EndProjectSection
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -39,6 +44,7 @@ Global
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{4BE414B8-5B2D-40C1-BA3E-7DBBD6F7D854} = {36D291AB-E468-4CE7-8DB3-2C46639FE5AE}
+		{B63714DC-6258-4032-9930-DFF0667624BC} = {36D291AB-E468-4CE7-8DB3-2C46639FE5AE}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {370218F4-B218-4C62-B7F7-D03B799F6349}

VersionUtilities/CharacterExtensions.cs

@@ -1,26 +0,0 @@
-using System;
-
-namespace AssetRipper.VersionUtilities
-{
-	internal static class CharacterExtensions
-	{
-		public static int ParseDigit(this char _this)
-		{
-			return _this - '0';
-		}
-
-		public static UnityVersionType ToUnityVersionType(this char _this)
-		{
-			return _this switch
-			{
-				'a' => UnityVersionType.Alpha,
-				'b' => UnityVersionType.Beta,
-				'c' => UnityVersionType.China,
-				'f' => UnityVersionType.Final,
-				'p' => UnityVersionType.Patch,
-				'x' => UnityVersionType.Experimental,
-				_ => throw new Exception($"Unsupported version type {_this}"),
-			};
-		}
-	}
-}

VersionUtilities/CompactUnityVersion24.Interfaces.cs

@@ -0,0 +1,61 @@
+namespace AssetRipper.VersionUtilities
+{
+	public partial struct CompactUnityVersion24 : IEquatable<CompactUnityVersion24>, IComparable, IComparable<CompactUnityVersion24>
+	{
+		/// <summary>
+		/// Compare to another object
+		/// </summary>
+		/// <param name="obj">Another object</param>
+		/// <returns>
+		/// 1 if this is larger or the other is not a Unity version<br/>
+		/// -1 if this is smaller<br/>
+		/// 0 if equal
+		/// </returns>
+		public int CompareTo(object? obj)
+		{
+			return obj is CompactUnityVersion24 version ? CompareTo(version) : 1;
+		}
+
+		/// <summary>
+		/// Compare two Unity versions
+		/// </summary>
+		/// <param name="other">Another Unity version</param>
+		/// <returns>
+		/// 1 if this is larger<br/>
+		/// -1 if this is smaller<br/>
+		/// 0 if equal
+		/// </returns>
+		public int CompareTo(CompactUnityVersion24 other)
+		{
+			if (this > other)
+				return 1;
+			else if (this < other)
+				return -1;
+			else
+				return 0;
+		}
+
+		/// <summary>
+		/// Check equality with another object
+		/// </summary>
+		/// <param name="obj">Another object</param>
+		/// <returns>True if they're equal; false otherwise</returns>
+		public override bool Equals(object? obj)
+		{
+			return obj is CompactUnityVersion24 version && this == version;
+		}
+
+		/// <summary>
+		/// Check equality with another Unity version
+		/// </summary>
+		/// <param name="other">Another Unity version</param>
+		/// <returns>True if they're equal; false otherwise</returns>
+		public bool Equals(CompactUnityVersion24 other) => this == other;
+
+		/// <inheritdoc/>
+		public override int GetHashCode()
+		{
+			return m_MajorMinorByte << 16 | m_BuildTypeShort;
+		}
+	}
+}

VersionUtilities/CompactUnityVersion24.Operators.cs

@@ -0,0 +1,111 @@
+namespace AssetRipper.VersionUtilities
+{
+	public partial struct CompactUnityVersion24
+	{
+		/// <summary>
+		/// Expand to 64 bits
+		/// </summary>
+		/// <param name="version">The version to convert</param>
+		public static implicit operator UnityVersion(CompactUnityVersion24 version)
+		{
+			return new UnityVersion(version.Major, version.Minor, version.Build, version.Type, version.TypeNumber);
+		}
+
+		/// <summary>
+		/// Expand to 32 bits
+		/// </summary>
+		/// <param name="version">The version to convert</param>
+		public static implicit operator CompactUnityVersion32(CompactUnityVersion24 version)
+		{
+			return new CompactUnityVersion32(version.Major, version.Minor, version.Build, version.Type, version.TypeNumber);
+		}
+
+		/// <summary>
+		/// Compact to 24 bits
+		/// </summary>
+		/// <param name="version"></param>
+		public static explicit operator CompactUnityVersion24(UnityVersion version)
+		{
+			return new CompactUnityVersion24(version.Major, (byte)version.Minor, (byte)version.Build, version.Type, version.TypeNumber);
+		}
+
+		/// <summary>
+		/// Compact to 24 bits
+		/// </summary>
+		/// <param name="version"></param>
+		public static explicit operator CompactUnityVersion24(CompactUnityVersion32 version)
+		{
+			return new CompactUnityVersion24(version.Major, version.Minor, version.Build, version.Type, version.TypeNumber);
+		}
+
+		/// <summary>
+		/// Equality operator
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator ==(CompactUnityVersion24 left, CompactUnityVersion24 right)
+		{
+			return left.m_MajorMinorByte == right.m_MajorMinorByte && left.m_BuildTypeShort == right.m_BuildTypeShort;
+		}
+
+		/// <summary>
+		/// Inequality operator
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator !=(CompactUnityVersion24 left, CompactUnityVersion24 right)
+		{
+			return left.m_MajorMinorByte != right.m_MajorMinorByte || left.m_BuildTypeShort != right.m_BuildTypeShort;
+		}
+
+		/// <summary>
+		/// Greater than
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator >(CompactUnityVersion24 left, CompactUnityVersion24 right)
+		{
+			return (left.m_MajorMinorByte > right.m_MajorMinorByte) ||
+				(left.m_MajorMinorByte == right.m_MajorMinorByte && left.m_BuildTypeShort > right.m_BuildTypeShort);
+		}
+
+		/// <summary>
+		/// Greater than or equal to
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator >=(CompactUnityVersion24 left, CompactUnityVersion24 right)
+		{
+			return (left.m_MajorMinorByte > right.m_MajorMinorByte) ||
+				(left.m_MajorMinorByte == right.m_MajorMinorByte && left.m_BuildTypeShort >= right.m_BuildTypeShort);
+		}
+
+		/// <summary>
+		/// Less than
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator <(CompactUnityVersion24 left, CompactUnityVersion24 right)
+		{
+			return (left.m_MajorMinorByte < right.m_MajorMinorByte) ||
+				(left.m_MajorMinorByte == right.m_MajorMinorByte && left.m_BuildTypeShort < right.m_BuildTypeShort);
+		}
+
+		/// <summary>
+		/// Less than or equal to
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator <=(CompactUnityVersion24 left, CompactUnityVersion24 right)
+		{
+			return (left.m_MajorMinorByte < right.m_MajorMinorByte) ||
+				(left.m_MajorMinorByte == right.m_MajorMinorByte && left.m_BuildTypeShort <= right.m_BuildTypeShort);
+		}
+	}
+}

VersionUtilities/CompactUnityVersion24.cs

@@ -0,0 +1,203 @@
+namespace AssetRipper.VersionUtilities
+{
+	/// <summary>
+	/// A compact value type for efficiently storing Unity versions inside 24 bits
+	/// </summary>
+	public partial struct CompactUnityVersion24
+	{
+		private const int majorOffset = 3;
+		private const int buildOffset = 9;
+		private const int typeOffset = 6;
+
+		private const uint bitMask3 = 0x0007U;
+		private const uint bitMask5 = 0x001FU;
+		private const uint bitMask6 = 0x003FU;
+		private const uint bitMask7 = 0x007FU;
+
+		/// <summary>
+		/// 5 bits for the major, 
+		/// 3 bits for the minor
+		/// </summary>
+		private readonly byte m_MajorMinorByte;
+
+		/// <summary>
+		/// 7 bits for the build, 
+		/// 3 bits for the type, 
+		/// 6 bits for the type number
+		/// </summary>
+		private readonly ushort m_BuildTypeShort;
+
+		/// <summary>
+		/// 2042
+		/// </summary>
+		public const ushort MajorMaxValue = (ushort)(31U + 2011U);
+
+		/// <summary>
+		/// 5 bits
+		/// </summary>
+		private byte MajorRaw => unchecked((byte)((m_MajorMinorByte >> majorOffset) & bitMask5));
+
+		/// <summary>
+		/// The first number in a Unity version string. 5 bits.
+		/// Valid values inclusive: 0 - 5, 2017 - 2042
+		/// </summary>
+		public ushort Major => ConvertMajorRawToNormal(MajorRaw);
+
+		/// <summary>
+		/// The second number in a Unity version string. 3 bits
+		/// </summary>
+		public byte Minor => unchecked((byte)(m_MajorMinorByte & bitMask3));
+
+		/// <summary>
+		/// The third number in a Unity version string. 7 bits
+		/// </summary>
+		public byte Build => unchecked((byte)((m_BuildTypeShort >> buildOffset) & bitMask7));
+
+		/// <summary>
+		/// The letter in a Unity version string. 3 bits
+		/// </summary>
+		public UnityVersionType Type => (UnityVersionType)unchecked((byte)((m_BuildTypeShort >> typeOffset) & bitMask3));
+
+		/// <summary>
+		/// The last number in a Unity version string. 6 bits
+		/// </summary>
+		public byte TypeNumber => unchecked((byte)(m_BuildTypeShort & bitMask6));
+
+		/// <summary>
+		/// The minimum value this type can have
+		/// </summary>
+		public static CompactUnityVersion24 MinVersion { get; } = new CompactUnityVersion24((byte)0, (ushort)0);
+
+		/// <summary>
+		/// The maximum value this type can have
+		/// </summary>
+		public static CompactUnityVersion24 MaxVersion { get; } = new CompactUnityVersion24(byte.MaxValue, ushort.MaxValue);
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion24(ushort major)
+		{
+			m_MajorMinorByte = unchecked((byte)(ConvertMajorRawToNormal(major) << majorOffset));
+			m_BuildTypeShort = 0;
+		}
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion24(ushort major, byte minor)
+		{
+			m_MajorMinorByte = unchecked((byte)((ConvertMajorRawToNormal(major) << majorOffset) | CastToThreeBits(minor)));
+			m_BuildTypeShort = 0;
+		}
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion24(ushort major, byte minor, byte build)
+		{
+			unchecked
+			{
+				m_MajorMinorByte = (byte)((ConvertMajorRawToNormal(major) << majorOffset) | CastToThreeBits(minor));
+				m_BuildTypeShort = (ushort)(CastToSevenBits(build) << buildOffset);
+			}
+		}
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion24(ushort major, byte minor, byte build, UnityVersionType type)
+		{
+			unchecked
+			{
+				m_MajorMinorByte = (byte)((ConvertMajorRawToNormal(major) << majorOffset) | CastToThreeBits(minor));
+				m_BuildTypeShort = (ushort)(
+					(CastToSevenBits(build) << buildOffset) | 
+					(CastToThreeBits((byte)type) << typeOffset));
+			}
+		}
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion24(ushort major, byte minor, byte build, UnityVersionType type, byte typeNumber)
+		{
+			unchecked
+			{
+				m_MajorMinorByte = (byte)((ConvertMajorRawToNormal(major) << majorOffset) | CastToThreeBits(minor));
+				m_BuildTypeShort = (ushort)(
+					(CastToSevenBits(build) << buildOffset) |
+					(CastToThreeBits((byte)type) << typeOffset) |
+					CastToSixBits(typeNumber));
+			}
+		}
+
+		private CompactUnityVersion24(byte majorMinorByte, ushort buildTypeShort)
+		{
+			m_MajorMinorByte = majorMinorByte;
+			m_BuildTypeShort = buildTypeShort;
+		}
+
+		/// <summary>
+		/// Converts this to its binary representation
+		/// </summary>
+		public void GetBits(out byte majorMinorByte, out ushort buildTypeShort)
+		{
+			majorMinorByte = m_MajorMinorByte;
+			buildTypeShort = m_BuildTypeShort;
+		}
+
+		/// <summary>
+		/// Converts a binary representation into its respective version
+		/// </summary>
+		/// <param name="majorMinorByte"></param>
+		/// <param name="buildTypeShort"></param>
+		/// <returns>A new Unity version with the cooresponding bits</returns>
+		public static CompactUnityVersion24 FromBits(byte majorMinorByte, ushort buildTypeShort) => new CompactUnityVersion24(majorMinorByte, buildTypeShort);
+
+		private static ushort ConvertMajorRawToNormal(byte raw)
+		{
+			return raw < 6 ? raw : unchecked((ushort)(raw + 2011U));
+		}
+
+		private static byte ConvertMajorRawToNormal(ushort major)
+		{
+			if (major < 6)
+			{
+				return unchecked((byte)major);
+			}
+			else if (major >= 2017 && major <= MajorMaxValue)
+			{
+				return unchecked((byte)(major - 2011U));
+			}
+			else
+			{
+				throw new ArgumentOutOfRangeException(nameof(major));
+			}
+		}
+
+		private static byte CastToThreeBits(byte b)
+		{
+			return b <= bitMask3 ? b : throw new ArgumentOutOfRangeException(nameof(b));
+		}
+
+		private static byte CastToSixBits(byte b)
+		{
+			return b <= bitMask6 ? b : throw new ArgumentOutOfRangeException(nameof(b));
+		}
+
+		private static byte CastToSevenBits(byte b)
+		{
+			return b <= bitMask7 ? b : throw new ArgumentOutOfRangeException(nameof(b));
+		}
+
+		/// <summary>
+		/// Serialize the version as a string
+		/// </summary>
+		/// <returns>A new string like 2019.4.3f1</returns>
+		public override string ToString()
+		{
+			return $"{Major}.{Minor}.{Build}{Type.ToCharacter()}{TypeNumber}";
+		}
+	}
+}

VersionUtilities/CompactUnityVersion32.Interfaces.cs

@@ -0,0 +1,61 @@
+namespace AssetRipper.VersionUtilities
+{
+	public partial struct CompactUnityVersion32 : IEquatable<CompactUnityVersion32>, IComparable, IComparable<CompactUnityVersion32>
+	{
+		/// <summary>
+		/// Compare to another object
+		/// </summary>
+		/// <param name="obj">Another object</param>
+		/// <returns>
+		/// 1 if this is larger or the other is not a Unity version<br/>
+		/// -1 if this is smaller<br/>
+		/// 0 if equal
+		/// </returns>
+		public int CompareTo(object? obj)
+		{
+			return obj is CompactUnityVersion32 version ? CompareTo(version) : 1;
+		}
+
+		/// <summary>
+		/// Compare two Unity versions
+		/// </summary>
+		/// <param name="other">Another Unity version</param>
+		/// <returns>
+		/// 1 if this is larger<br/>
+		/// -1 if this is smaller<br/>
+		/// 0 if equal
+		/// </returns>
+		public int CompareTo(CompactUnityVersion32 other)
+		{
+			if (this > other)
+				return 1;
+			else if (this < other)
+				return -1;
+			else
+				return 0;
+		}
+
+		/// <summary>
+		/// Check equality with another object
+		/// </summary>
+		/// <param name="obj">Another object</param>
+		/// <returns>True if they're equal; false otherwise</returns>
+		public override bool Equals(object? obj)
+		{
+			return obj is CompactUnityVersion32 version && this == version;
+		}
+
+		/// <summary>
+		/// Check equality with another Unity version
+		/// </summary>
+		/// <param name="other">Another Unity version</param>
+		/// <returns>True if they're equal; false otherwise</returns>
+		public bool Equals(CompactUnityVersion32 other) => this == other;
+
+		/// <inheritdoc/>
+		public override int GetHashCode()
+		{
+			return m_data.GetHashCode();
+		}
+	}
+}

VersionUtilities/CompactUnityVersion32.Operators.cs

@@ -0,0 +1,89 @@
+namespace AssetRipper.VersionUtilities
+{
+	public partial struct CompactUnityVersion32
+	{
+		/// <summary>
+		/// Expand to 64 bits
+		/// </summary>
+		/// <param name="version">The version to convert</param>
+		public static implicit operator UnityVersion(CompactUnityVersion32 version)
+		{
+			return new UnityVersion(version.Major, version.Minor, version.Build, version.Type, version.TypeNumber);
+		}
+
+		/// <summary>
+		/// Compact to 32 bits
+		/// </summary>
+		/// <param name="version"></param>
+		public static explicit operator CompactUnityVersion32(UnityVersion version)
+		{
+			return new CompactUnityVersion32(version.Major, (byte)version.Minor, (byte)version.Build, version.Type, version.TypeNumber);
+		}
+
+		/// <summary>
+		/// Equality operator
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator ==(CompactUnityVersion32 left, CompactUnityVersion32 right)
+		{
+			return left.m_data == right.m_data;
+		}
+
+		/// <summary>
+		/// Inequality operator
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator !=(CompactUnityVersion32 left, CompactUnityVersion32 right)
+		{
+			return left.m_data != right.m_data;
+		}
+
+		/// <summary>
+		/// Greater than
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator >(CompactUnityVersion32 left, CompactUnityVersion32 right)
+		{
+			return left.m_data > right.m_data;
+		}
+
+		/// <summary>
+		/// Greater than or equal to
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator >=(CompactUnityVersion32 left, CompactUnityVersion32 right)
+		{
+			return left.m_data >= right.m_data;
+		}
+
+		/// <summary>
+		/// Less than
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator <(CompactUnityVersion32 left, CompactUnityVersion32 right)
+		{
+			return left.m_data < right.m_data;
+		}
+
+		/// <summary>
+		/// Less than or equal to
+		/// </summary>
+		/// <param name="left">The left Unity version</param>
+		/// <param name="right">The right Unity version</param>
+		/// <returns></returns>
+		public static bool operator <=(CompactUnityVersion32 left, CompactUnityVersion32 right)
+		{
+			return left.m_data <= right.m_data;
+		}
+	}
+}

VersionUtilities/CompactUnityVersion32.cs

@@ -0,0 +1,164 @@
+namespace AssetRipper.VersionUtilities
+{
+	/// <summary>
+	/// A compact value type for efficiently storing Unity versions inside 32 bits
+	/// </summary>
+	public partial struct CompactUnityVersion32
+	{
+		private const int majorOffset = 24;
+		private const int minorOffset = 20;
+		private const int buildOffset = 12;
+		private const int typeOffset = 8;
+
+		private const uint byteMask = 0x00FFU;
+		private const uint bitMask4 = 0x000FU;
+
+		private readonly uint m_data;
+
+		/// <summary>
+		/// 2266
+		/// </summary>
+		public const ushort MajorMaxValue = (ushort)(byte.MaxValue + 2011U);
+
+		/// <summary>
+		/// 8 bits
+		/// </summary>
+		private byte MajorRaw => unchecked((byte)((m_data >> majorOffset) & byteMask));
+
+		/// <summary>
+		/// The first number in a Unity version string. 8 bits.
+		/// Valid values inclusive: 0 - 5, 2017 - 2266
+		/// </summary>
+		public ushort Major => ConvertMajorRawToNormal(MajorRaw);
+
+		/// <summary>
+		/// The second number in a Unity version string. 4 bits
+		/// </summary>
+		public byte Minor => unchecked((byte)((m_data >> minorOffset) & bitMask4));
+
+		/// <summary>
+		/// The third number in a Unity version string. 8 bits
+		/// </summary>
+		public byte Build => unchecked((byte)((m_data >> buildOffset) & byteMask));
+
+		/// <summary>
+		/// The letter in a Unity version string. 4 bits
+		/// </summary>
+		public UnityVersionType Type => (UnityVersionType)unchecked((byte)((m_data >> typeOffset) & bitMask4));
+
+		/// <summary>
+		/// The last number in a Unity version string. 8 bits
+		/// </summary>
+		public byte TypeNumber => unchecked((byte)(m_data & byteMask));
+
+		/// <summary>
+		/// The minimum value this type can have
+		/// </summary>
+		public static CompactUnityVersion32 MinVersion { get; } = new CompactUnityVersion32(0U);
+
+		/// <summary>
+		/// The maximum value this type can have
+		/// </summary>
+		public static CompactUnityVersion32 MaxVersion { get; } = new CompactUnityVersion32(uint.MaxValue);
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion32(ushort major)
+		{
+			m_data = (uint)ConvertMajorRawToNormal(major) << majorOffset;
+		}
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion32(ushort major, byte minor)
+		{
+			m_data = ((uint)ConvertMajorRawToNormal(major) << majorOffset) | ((uint)CastToFourBits(minor) << minorOffset);
+		}
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion32(ushort major, byte minor, byte build)
+		{
+			m_data = ((uint)ConvertMajorRawToNormal(major) << majorOffset) | ((uint)CastToFourBits(minor) << minorOffset) | ((uint)build << buildOffset);
+		}
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion32(ushort major, byte minor, byte build, UnityVersionType type)
+		{
+			m_data = ((uint)ConvertMajorRawToNormal(major) << majorOffset) | ((uint)CastToFourBits(minor) << minorOffset) | ((uint)build << buildOffset)
+				| ((uint)CastToFourBits(type) << typeOffset);
+		}
+
+		/// <summary>
+		/// Construct a new Unity version
+		/// </summary>
+		public CompactUnityVersion32(ushort major, byte minor, byte build, UnityVersionType type, byte typeNumber)
+		{
+			m_data = ((uint)ConvertMajorRawToNormal(major) << majorOffset) | ((uint)CastToFourBits(minor) << minorOffset) | ((uint)build << buildOffset)
+				| ((uint)CastToFourBits(type) << typeOffset) | typeNumber;
+		}
+
+		private CompactUnityVersion32(uint data)
+		{
+			m_data = data;
+		}
+
+		/// <summary>
+		/// Converts this to its binary representation
+		/// </summary>
+		/// <returns>An unsigned integer having the same bits as this</returns>
+		public uint GetBits() => m_data;
+
+		/// <summary>
+		/// Converts a binary representation into its respective version
+		/// </summary>
+		/// <param name="bits">An unsigned integer having the relevant bits</param>
+		/// <returns>A new Unity version with the cooresponding bits</returns>
+		public static CompactUnityVersion32 FromBits(uint bits) => new CompactUnityVersion32(bits);
+
+		private static ushort ConvertMajorRawToNormal(byte raw)
+		{
+			return raw < 6 ? raw : unchecked((ushort)(raw + 2011U));
+		}
+
+		private static byte ConvertMajorRawToNormal(ushort major)
+		{
+			if (major < 6)
+			{
+				return unchecked((byte)major);
+			}
+			else if (major >= 2017 && major <= MajorMaxValue)
+			{
+				return unchecked((byte)(major - 2011U));
+			}
+			else
+			{
+				throw new ArgumentOutOfRangeException(nameof(major));
+			}
+		}
+
+		private static byte CastToFourBits(byte b)
+		{
+			return b <= bitMask4 ? b : throw new ArgumentOutOfRangeException(nameof(b));
+		}
+
+		private static UnityVersionType CastToFourBits(UnityVersionType type)
+		{
+			return (byte)type <= bitMask4 ? type : throw new ArgumentOutOfRangeException(nameof(type));
+		}
+
+		/// <summary>
+		/// Serialize the version as a string
+		/// </summary>
+		/// <returns>A new string like 2019.4.3f1</returns>
+		public override string ToString()
+		{
+			return $"{Major}.{Minor}.{Build}{Type.ToCharacter()}{TypeNumber}";
+		}
+	}
+}

VersionUtilities/Extensions/BinaryReaderExtensions.cs

@@ -0,0 +1,42 @@
+using System.IO;
+
+namespace AssetRipper.VersionUtilities.Extensions
+{
+	/// <summary>
+	/// Unity version extension methods for <see cref="BinaryReader"/>
+	/// </summary>
+	public static class BinaryReaderExtensions
+	{
+		/// <summary>
+		/// Reads a Unity version from the stream
+		/// </summary>
+		/// <param name="reader">A binary reader</param>
+		/// <returns>The read Unity version</returns>
+		public static UnityVersion ReadUnityVersion(this BinaryReader reader)
+		{
+			return UnityVersion.FromBits(reader.ReadUInt64());
+		}
+
+		/// <summary>
+		/// Reads a Unity version from the stream
+		/// </summary>
+		/// <param name="reader">A binary reader</param>
+		/// <returns>The read Unity version</returns>
+		public static CompactUnityVersion32 ReadCompactUnityVersion32(this BinaryReader reader)
+		{
+			return CompactUnityVersion32.FromBits(reader.ReadUInt32());
+		}
+
+		/// <summary>
+		/// Reads a Unity version from the stream
+		/// </summary>
+		/// <param name="reader">A binary reader</param>
+		/// <returns>The read Unity version</returns>
+		public static CompactUnityVersion24 ReadCompactUnityVersion24(this BinaryReader reader)
+		{
+			byte b = reader.ReadByte();
+			ushort s = reader.ReadUInt16();
+			return CompactUnityVersion24.FromBits(b, s);
+		}
+	}
+}

VersionUtilities/Extensions/BinaryWriterExtensions.cs

@@ -0,0 +1,42 @@
+using System.IO;
+
+namespace AssetRipper.VersionUtilities.Extensions
+{
+	/// <summary>
+	/// Unity version extension methods for <see cref="BinaryWriter"/>
+	/// </summary>
+	public static class BinaryWriterExtensions
+	{
+		/// <summary>
+		/// Write a Unity version to the stream
+		/// </summary>
+		/// <param name="writer">A binary writer</param>
+		/// <param name="version">A Unity version</param>
+		public static void Write(this BinaryWriter writer, UnityVersion version)
+		{
+			writer.Write(version.GetBits());
+		}
+
+		/// <summary>
+		/// Write a Unity version to the stream
+		/// </summary>
+		/// <param name="writer">A binary writer</param>
+		/// <param name="version">A Unity version</param>
+		public static void Write(this BinaryWriter writer, CompactUnityVersion32 version)
+		{
+			writer.Write(version.GetBits());
+		}
+
+		/// <summary>
+		/// Write a Unity version to the stream
+		/// </summary>
+		/// <param name="writer">A binary writer</param>
+		/// <param name="version">A Unity version</param>
+		public static void Write(this BinaryWriter writer, CompactUnityVersion24 version)
+		{
+			version.GetBits(out byte b, out ushort s);
+			writer.Write(b);
+			writer.Write(s);
+		}
+	}
+}

VersionUtilities/Extensions/CharacterExtensions.cs

@@ -0,0 +1,33 @@
+namespace AssetRipper.VersionUtilities.Extensions
+{
+	/// <summary>
+	/// Extensions for <see cref="char"/>
+	/// </summary>
+	public static class CharacterExtensions
+	{
+		internal static int ParseDigit(this char _this)
+		{
+			return _this - '0';
+		}
+
+		/// <summary>
+		/// Parse a character into a Unity Version Type
+		/// </summary>
+		/// <param name="c">The character</param>
+		/// <returns></returns>
+		/// <exception cref="ArgumentException">No version type for character</exception>
+		public static UnityVersionType ToUnityVersionType(this char c)
+		{
+			return c switch
+			{
+				'a' => UnityVersionType.Alpha,
+				'b' => UnityVersionType.Beta,
+				'c' => UnityVersionType.China,
+				'f' => UnityVersionType.Final,
+				'p' => UnityVersionType.Patch,
+				'x' => UnityVersionType.Experimental,
+				_ => throw new ArgumentException($"There is no version type {c}", nameof(c)),
+			};
+		}
+	}
+}

VersionUtilities/GlobalUsings.cs

@@ -0,0 +1 @@
+global using System;

VersionUtilities/Properties/AssemblyInfo.cs

@@ -0,0 +1,3 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("VersionUtilities.Tests")]

VersionUtilities/UnityVersion.ComparisonMethods.cs

@@ -2,68 +2,66 @@
 {
 	public readonly partial struct UnityVersion
 	{
+		private const ulong subMajorMask = 0x0000FFFFFFFFFFFFUL;
+		private const ulong subMinorMask = 0x00000000FFFFFFFFUL;
+		private const ulong subBuildMask = 0x000000000000FFFFUL;
+		private const ulong subTypeMask = 0x00000000000000FFUL;
 #pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
-		public bool IsEqual(int major) => this == From(major);
-		public bool IsEqual(int major, int minor) => this == From(major, minor);
-		public bool IsEqual(int major, int minor, int build) => this == From(major, minor, build);
-		public bool IsEqual(int major, int minor, int build, UnityVersionType type) => this == From(major, minor, build, type);
-		public bool IsEqual(int major, int minor, int build, UnityVersionType type, int typeNumber) => this == new UnityVersion(major, minor, build, type, typeNumber);
+		public bool IsEqual(ushort major) => this == From(major);
+		public bool IsEqual(ushort major, ushort minor) => this == From(major, minor);
+		public bool IsEqual(ushort major, ushort minor, ushort build) => this == From(major, minor, build);
+		public bool IsEqual(ushort major, ushort minor, ushort build, UnityVersionType type) => this == From(major, minor, build, type);
+		public bool IsEqual(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this == new UnityVersion(major, minor, build, type, typeNumber);
 		public bool IsEqual(string version) => this == Parse(version);
 
-		public bool IsLess(int major) => this < From(major);
-		public bool IsLess(int major, int minor) => this < From(major, minor);
-		public bool IsLess(int major, int minor, int build) => this < From(major, minor, build);
-		public bool IsLess(int major, int minor, int build, UnityVersionType type) => this < From(major, minor, build, type);
-		public bool IsLess(int major, int minor, int build, UnityVersionType type, int typeNumber) => this < new UnityVersion(major, minor, build, type, typeNumber);
+		public bool IsLess(ushort major) => this < From(major);
+		public bool IsLess(ushort major, ushort minor) => this < From(major, minor);
+		public bool IsLess(ushort major, ushort minor, ushort build) => this < From(major, minor, build);
+		public bool IsLess(ushort major, ushort minor, ushort build, UnityVersionType type) => this < From(major, minor, build, type);
+		public bool IsLess(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this < new UnityVersion(major, minor, build, type, typeNumber);
 		public bool IsLess(string version) => this < Parse(version);
 
-		public bool IsLessEqual(int major) => this <= From(major);
-		public bool IsLessEqual(int major, int minor) => this <= From(major, minor);
-		public bool IsLessEqual(int major, int minor, int build) => this <= From(major, minor, build);
-		public bool IsLessEqual(int major, int minor, int build, UnityVersionType type) => this <= From(major, minor, build, type);
-		public bool IsLessEqual(int major, int minor, int build, UnityVersionType type, int typeNumber) => this <= new UnityVersion(major, minor, build, type, typeNumber);
+		public bool IsLessEqual(ushort major) => this <= From(major);
+		public bool IsLessEqual(ushort major, ushort minor) => this <= From(major, minor);
+		public bool IsLessEqual(ushort major, ushort minor, ushort build) => this <= From(major, minor, build);
+		public bool IsLessEqual(ushort major, ushort minor, ushort build, UnityVersionType type) => this <= From(major, minor, build, type);
+		public bool IsLessEqual(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this <= new UnityVersion(major, minor, build, type, typeNumber);
 		public bool IsLessEqual(string version) => this <= Parse(version);
 
-		public bool IsGreater(int major) => this > From(major);
-		public bool IsGreater(int major, int minor) => this > From(major, minor);
-		public bool IsGreater(int major, int minor, int build) => this > From(major, minor, build);
-		public bool IsGreater(int major, int minor, int build, UnityVersionType type) => this > From(major, minor, build, type);
-		public bool IsGreater(int major, int minor, int build, UnityVersionType type, int typeNumber) => this > new UnityVersion(major, minor, build, type, typeNumber);
+		public bool IsGreater(ushort major) => this > From(major);
+		public bool IsGreater(ushort major, ushort minor) => this > From(major, minor);
+		public bool IsGreater(ushort major, ushort minor, ushort build) => this > From(major, minor, build);
+		public bool IsGreater(ushort major, ushort minor, ushort build, UnityVersionType type) => this > From(major, minor, build, type);
+		public bool IsGreater(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this > new UnityVersion(major, minor, build, type, typeNumber);
 		public bool IsGreater(string version) => this > Parse(version);
 
-		public bool IsGreaterEqual(int major) => this >= From(major);
-		public bool IsGreaterEqual(int major, int minor) => this >= From(major, minor);
-		public bool IsGreaterEqual(int major, int minor, int build) => this >= From(major, minor, build);
-		public bool IsGreaterEqual(int major, int minor, int build, UnityVersionType type) => this >= From(major, minor, build, type);
-		public bool IsGreaterEqual(int major, int minor, int build, UnityVersionType type, int typeNumber) => this >= new UnityVersion(major, minor, build, type, typeNumber);
+		public bool IsGreaterEqual(ushort major) => this >= From(major);
+		public bool IsGreaterEqual(ushort major, ushort minor) => this >= From(major, minor);
+		public bool IsGreaterEqual(ushort major, ushort minor, ushort build) => this >= From(major, minor, build);
+		public bool IsGreaterEqual(ushort major, ushort minor, ushort build, UnityVersionType type) => this >= From(major, minor, build, type);
+		public bool IsGreaterEqual(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this >= new UnityVersion(major, minor, build, type, typeNumber);
 		public bool IsGreaterEqual(string version) => this >= Parse(version);
 		
-		private UnityVersion From(int major)
+		private UnityVersion From(ushort major)
 		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | (0x0000FFFFFFFFFFFFUL & m_data);
+			ulong data = ((ulong)major << majorOffset) | subMajorMask & m_data;
 			return new UnityVersion(data);
 		}
-		private UnityVersion From(int major, int minor)
+		private UnityVersion From(ushort major, ushort minor)
 		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | (0x000000FFFFFFFFFFUL & m_data);
+			ulong data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | subMinorMask & m_data;
 			return new UnityVersion(data);
 		}
-		private UnityVersion From(int major, int minor, int build)
+		private UnityVersion From(ushort major, ushort minor, ushort build)
 		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32) |
-				(0x00000000FFFFFFFFUL & m_data);
+			ulong data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset) |
+				subBuildMask & m_data;
 			return new UnityVersion(data);
 		}
-		private UnityVersion From(int major, int minor, int build, UnityVersionType type)
+		private UnityVersion From(ushort major, ushort minor, ushort build, UnityVersionType type)
 		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32) |
-				((ulong)((int)type & 0xFF) << 24) | (0x0000000000FFFFFFUL & m_data);
-			return new UnityVersion(data);
-		}
-		private UnityVersion From(int major, int minor, int build, UnityVersionType type, int typeNumber)
-		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32)
-				| ((ulong)((int)type & 0xFF) << 24) | ((ulong)(typeNumber & 0xFF) << 16) | (0x000000000000FFFFUL & m_data);
+			ulong data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset) |
+				((ulong)(ushort)type << typeOffset) | subTypeMask & m_data;
 			return new UnityVersion(data);
 		}
 #pragma warning restore CS1591 // Missing XML comment for publicly visible type or member

VersionUtilities/UnityVersion.Interfaces.cs

@@ -1,6 +1,4 @@
-using System;
-
-namespace AssetRipper.VersionUtilities
+namespace AssetRipper.VersionUtilities
 {
 	public readonly partial struct UnityVersion : IEquatable<UnityVersion>, IComparable, IComparable<UnityVersion>
 	{

VersionUtilities/UnityVersion.MathMethods.cs

@@ -43,5 +43,39 @@
 				? right.m_data - left.m_data 
 				: left.m_data - right.m_data;
 		}
+
+		/// <summary>
+		/// Get the closest Unity version in an array of versions using <see cref="Distance(UnityVersion, UnityVersion)"/>
+		/// </summary>
+		/// <param name="versions">The Unity version array</param>
+		/// <returns>The closest Unity version</returns>
+		/// <exception cref="ArgumentNullException">The array is null</exception>
+		/// <exception cref="ArgumentException">The array is empty</exception>
+		public UnityVersion GetClosestVersion(UnityVersion[] versions)
+		{
+			if (versions is null)
+			{
+				throw new ArgumentNullException(nameof(versions));
+			}
+
+			if (versions.Length == 0)
+			{
+				throw new ArgumentException("Length cannot be zero", nameof(versions));
+			}
+
+			UnityVersion result = versions[0];
+			ulong currentDistance = Distance(this, result);
+			for(int i = 1; i < versions.Length; i++)
+			{
+				ulong newDistance = Distance(this, versions[i]);
+				if (newDistance < currentDistance)
+				{
+					currentDistance = newDistance;
+					result = versions[i];
+				}
+			}
+
+			return result;
+		}
 	}
 }

VersionUtilities/UnityVersion.Parsing.cs

@@ -1,4 +1,4 @@
-using System;
+using AssetRipper.VersionUtilities.Extensions;
 using System.IO;
 using System.Text;
 
@@ -12,7 +12,7 @@ namespace AssetRipper.VersionUtilities
 		/// <returns>A new string like 2019.4.3f1</returns>
 		public override string ToString()
 		{
-			return $"{Major}.{Minor}.{Build}{Type.ToLiteral()}{TypeNumber}";
+			return $"{Major}.{Minor}.{Build}{Type.ToCharacter()}{TypeNumber}";
 		}
 
 		/// <summary>
@@ -37,7 +37,7 @@ namespace AssetRipper.VersionUtilities
 			sb.Append(separator);
 			sb.Append(Build);
 			sb.Append(separator);
-			sb.Append(Type.ToLiteral());
+			sb.Append(Type.ToCharacter());
 			sb.Append(TypeNumber);
 			
 			if(hasExtension)
@@ -161,7 +161,7 @@ namespace AssetRipper.VersionUtilities
 				typeNumber = typeNumber * 10 + c.ParseDigit();
 			}
 
-			return new UnityVersion(major, minor, build, versionType, typeNumber);
+			return new UnityVersion((ushort)major, (ushort)minor, (ushort)build, versionType, (byte)typeNumber);
 		}
 	}
 }

VersionUtilities/UnityVersion.cs

@@ -5,32 +5,40 @@
 	/// </summary>
 	public readonly partial struct UnityVersion
 	{
+		private const int majorOffset = 48;
+		private const int minorOffset = 32;
+		private const int buildOffset = 16;
+		private const int typeOffset = 8;
+
+		private const ulong byteMask = 0xFFUL;
+		private const ulong ushortMask = 0xFFFFUL;
+
 		private readonly ulong m_data;
 
 		/// <summary>
 		/// The first number in a Unity version string
 		/// </summary>
-		public int Major => unchecked((int)((m_data >> 48) & 0xFFFFUL));
+		public ushort Major => unchecked((ushort)((m_data >> majorOffset) & ushortMask));
 
 		/// <summary>
 		/// The second number in a Unity version string
 		/// </summary>
-		public int Minor => unchecked((int)((m_data >> 40) & 0xFFUL));
+		public ushort Minor => unchecked((ushort)((m_data >> minorOffset) & ushortMask));
 
 		/// <summary>
 		/// The third number in a Unity version string
 		/// </summary>
-		public int Build => unchecked((int)((m_data >> 32) & 0xFFUL));
+		public ushort Build => unchecked((ushort)((m_data >> buildOffset) & ushortMask));
 
 		/// <summary>
 		/// The letter in a Unity version string
 		/// </summary>
-		public UnityVersionType Type => (UnityVersionType)unchecked((int)((m_data >> 24) & 0xFFUL));
+		public UnityVersionType Type => (UnityVersionType)unchecked((byte)((m_data >> typeOffset) & byteMask));
 
 		/// <summary>
 		/// The last number in a Unity version string
 		/// </summary>
-		public int TypeNumber => unchecked((int)((m_data >> 16) & 0xFFUL));
+		public byte TypeNumber => unchecked((byte)(m_data & byteMask));
 
 		/// <summary>
 		/// The minimum value this type can have
@@ -45,48 +53,61 @@
 		/// <summary>
 		/// Construct a new Unity version
 		/// </summary>
-		public UnityVersion(int major)
+		public UnityVersion(ushort major)
 		{
-			m_data = (ulong)(major & 0xFFFF) << 48;
+			m_data = (ulong)major << majorOffset;
 		}
 
 		/// <summary>
 		/// Construct a new Unity version
 		/// </summary>
-		public UnityVersion(int major, int minor)
+		public UnityVersion(ushort major, ushort minor)
 		{
-			m_data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40);
+			m_data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset);
 		}
 
 		/// <summary>
 		/// Construct a new Unity version
 		/// </summary>
-		public UnityVersion(int major, int minor, int build)
+		public UnityVersion(ushort major, ushort minor, ushort build)
 		{
-			m_data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32);
+			m_data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset);
 		}
 
 		/// <summary>
 		/// Construct a new Unity version
 		/// </summary>
-		public UnityVersion(int major, int minor, int build, UnityVersionType type)
+		public UnityVersion(ushort major, ushort minor, ushort build, UnityVersionType type)
 		{
-			m_data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32)
-				| ((ulong)((int)type & 0xFF) << 24);
+			m_data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset)
+				| ((ulong)type << typeOffset);
 		}
 
 		/// <summary>
 		/// Construct a new Unity version
 		/// </summary>
-		public UnityVersion(int major, int minor, int build, UnityVersionType type, int typeNumber)
+		public UnityVersion(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber)
 		{
-			m_data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32)
-				| ((ulong)((int)type & 0xFF) << 24) | ((ulong)(typeNumber & 0xFF) << 16);
+			m_data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset)
+				| ((ulong)type << typeOffset) | typeNumber;
 		}
 
 		private UnityVersion(ulong data)
 		{
 			m_data = data;
 		}
+
+		/// <summary>
+		/// Converts this to its binary representation
+		/// </summary>
+		/// <returns>An unsigned long integer having the same bits as this</returns>
+		public ulong GetBits() => m_data;
+
+		/// <summary>
+		/// Converts a binary representation into its respective version
+		/// </summary>
+		/// <param name="bits">An unsigned long integer having the relevant bits</param>
+		/// <returns>A new Unity version with the cooresponding bits</returns>
+		public static UnityVersion FromBits(ulong bits) => new UnityVersion(bits);
 	}
 }

VersionUtilities/UnityVersionType.cs

@@ -1,11 +1,9 @@
-using System;
-
-namespace AssetRipper.VersionUtilities
+namespace AssetRipper.VersionUtilities
 {
 	/// <summary>
 	/// An enumeration representing the letter in a Unity Version string
 	/// </summary>
-	public enum UnityVersionType
+	public enum UnityVersionType : byte
 	{
 		/// <summary>
 		/// a
@@ -53,9 +51,18 @@ namespace AssetRipper.VersionUtilities
 		/// <param name="_this">A Unity version type</param>
 		/// <returns>The character this value represents</returns>
 		/// <exception cref="ArgumentOutOfRangeException">The type is not a valid value</exception>
-		public static char ToLiteral(this UnityVersionType _this)
+		[Obsolete("Changed to ToCharacter", true)]
+		public static char ToLiteral(this UnityVersionType _this) => _this.ToCharacter();
+
+		/// <summary>
+		/// Convert to the relevant character
+		/// </summary>
+		/// <param name="type">A Unity version type</param>
+		/// <returns>The character this value represents</returns>
+		/// <exception cref="ArgumentOutOfRangeException">The type is not a valid value</exception>
+		public static char ToCharacter(this UnityVersionType type)
 		{
-			return _this switch
+			return type switch
 			{
 				UnityVersionType.Alpha => 'a',
 				UnityVersionType.Beta => 'b',
@@ -63,7 +70,7 @@ namespace AssetRipper.VersionUtilities
 				UnityVersionType.Final => 'f',
 				UnityVersionType.Patch => 'p',
 				UnityVersionType.Experimental => 'x',
-				_ => throw new ArgumentOutOfRangeException(nameof(_this), $"Unsupported version type {_this}"),
+				_ => 'u',//unknown
 			};
 		}
 	}

VersionUtilities/VersionUtilities.csproj

@@ -6,10 +6,11 @@
 		<Nullable>enable</Nullable>
 		<ImplicitUsings>disable</ImplicitUsings>
 		<RootNamespace>AssetRipper.VersionUtilities</RootNamespace>
+		<AssemblyName>AssetRipper.VersionUtilities</AssemblyName>
 		<Authors>ds5678</Authors>
 		<Company>AssetRipper</Company>
-		<Version>1.0.1.0</Version>
-		<AssemblyVersion>1.0.1.0</AssemblyVersion>
+		<Version>1.2.1.0</Version>
+		<AssemblyVersion>1.2.1.0</AssemblyVersion>
 		<PackageId>AssetRipper.VersionUtilities</PackageId>
 		<PackageTags>C# version unity unity3d</PackageTags>
 		<RepositoryUrl>https://github.com/AssetRipper/VersionUtilities</RepositoryUrl>
@@ -22,5 +23,9 @@
 		<GenerateDocumentationFile>true</GenerateDocumentationFile>
 		<DocumentationFile>bin\VersionUtilities.xml</DocumentationFile>
 	</PropertyGroup>
+	
+	<PropertyGroup Condition=" '$(TargetFramework)' != 'netframework3.5' and '$(TargetFramework)' != 'netframework4.0' ">
+		<IsTrimmable>true</IsTrimmable>
+	</PropertyGroup>
 
 </Project>