Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6

mcs/class/corlib/legacy/Context.cs

@@ -0,0 +1,28 @@
+using System.Runtime.Remoting.Messaging;
+using System.Runtime.InteropServices;
+
+namespace System.Runtime.Remoting.Contexts
+{
+	[StructLayout (LayoutKind.Sequential)]
+	public sealed class Context
+	{
+#region Keep this code, it is used by the runtime
+#pragma warning disable 169, 414
+		int domain_id;
+		int context_id;
+		UIntPtr static_data; /* GC-tracked */
+		UIntPtr data;
+
+		[ContextStatic]
+		static object[] local_slots;
+#pragma warning restore 169, 414
+
+		internal bool NeedsContextSink => throw new PlatformNotSupportedException ();
+#endregion
+
+		Context ()
+		{
+			throw new PlatformNotSupportedException ();
+		}
+	}
+}