Initial sync

Nbt/Exceptions/UnknownCompressionSchemeException.cs

@@ -0,0 +1,16 @@
+namespace Nbt;
+
+public class UnknownCompressionSchemeException : NbtException
+{
+    public int CompressionMode { get; }
+
+    public UnknownCompressionSchemeException(int mode)
+    {
+        CompressionMode = mode;
+    }
+
+    public UnknownCompressionSchemeException(int mode, string? message) : base(message)
+    {
+        CompressionMode = mode;
+    }
+}