Bump version to 3.1.6 in project file

Updated the version number from 3.1.5 to 3.1.6 in the AssetRipper.Primitives.csproj file.

AssetRipper.Primitives/AssetRipper.Primitives.csproj

@@ -6,7 +6,7 @@
 		<Nullable>enable</Nullable>
 		<Authors>ds5678</Authors>
 		<Company>AssetRipper</Company>
-		<Version>3.1.5</Version>
+		<Version>3.1.6</Version>
 		<AssemblyVersion>$(Version)</AssemblyVersion>
 		<PackageId>AssetRipper.Primitives</PackageId>
 		<PackageTags>C# assetripper unity unity3d</PackageTags>

AssetRipper.Primitives/Utf8String.cs

@@ -11,12 +11,15 @@ namespace AssetRipper.Primitives;
 /// <remarks>
 /// Conversions to and from <see cref="string"/> are handled by <see cref="Encoding.UTF8"/>.
 /// </remarks>
+#if NET5_0_OR_GREATER
+[System.Text.Json.Serialization.JsonConverter(typeof(Utf8StringJsonConverter))]
+#endif
 public sealed class Utf8String :
 #if NET7_0_OR_GREATER
 	System.Numerics.IEqualityOperators<Utf8String?, Utf8String?, bool>,
-    System.Numerics.IEqualityOperators<Utf8String?, string?, bool>,
+	System.Numerics.IEqualityOperators<Utf8String?, string?, bool>,
 #endif
-    IEquatable<Utf8String>
+	IEquatable<Utf8String>
 {
 	private readonly byte[] data;
 	private string? cachedString;
@@ -28,7 +31,7 @@ public sealed class Utf8String :
 	/// </summary>
 	public Utf8String()
 	{
-		data = Array.Empty<byte>();
+		data = [];
 		cachedString = "";
 	}
 

AssetRipper.Primitives/Utf8StringJsonConverter.cs

@@ -0,0 +1,19 @@
+#if NET5_0_OR_GREATER
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace AssetRipper.Primitives;
+
+public sealed class Utf8StringJsonConverter : JsonConverter<Utf8String>
+{
+	public override Utf8String Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+	{
+		return reader.GetString() ?? throw new JsonException("String was read as null");
+	}
+
+	public override void Write(Utf8JsonWriter writer, Utf8String value, JsonSerializerOptions options)
+	{
+		writer.WriteStringValue(value.ToString());
+	}
+}
+#endif