Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-820.cs

@@ -0,0 +1,22 @@
+// Compiler options: -main:C
+
+using System;
+
+namespace NS
+{
+	public class C
+	{
+		public static void Main ()
+		{
+			throw new NotImplementedException ();
+		}
+	}
+}
+
+public class C
+{
+	public static int Main (string[] a)
+	{
+		return 0;
+	}
+}