Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/tests/test-436.cs

@@ -0,0 +1,9 @@
+using foo = System.Collections;
+
+class X : foo::IEnumerable {
+	foo::IEnumerator foo::IEnumerable.GetEnumerator () { return null; }
+	public static void Main ()
+	{
+		System.Collections.IEnumerable x = new X ();
+	}
+}