Imported Upstream version 6.4.0.137

Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6

mcs/class/corlib/legacy/MarshalByRefObject.cs

@@ -0,0 +1,33 @@
+using System.Runtime.InteropServices;
+
+namespace System
+{
+	[StructLayout (LayoutKind.Sequential)]
+	public abstract class MarshalByRefObject
+	{
+#region Keep this code, it is used by the runtime
+#pragma warning disable 169, 649
+		private object _identity;
+#pragma warning restore 169, 649
+#endregion
+
+		protected MarshalByRefObject ()
+		{
+		}
+
+		public object GetLifetimeService ()
+		{
+			throw new PlatformNotSupportedException ();
+		}
+
+		public virtual object InitializeLifetimeService ()
+		{
+			throw new PlatformNotSupportedException ();
+		}
+
+		protected MarshalByRefObject MemberwiseClone (bool cloneIdentity)
+		{
+			throw new PlatformNotSupportedException ();
+		}
+	}
+}