public void MethodReturnTwoArg()
        {
            TestClass      orig        = new TestClass();
            ITestInterface asInterface = ReflectedCaster.Default.CastToInterface <ITestInterface>(orig);

            string ret = asInterface.MethodReturnTwoArg("Hello world", 18);

            Assert.Equal("Hello world18", orig.ReturnCode);
            Assert.Equal("Hello world18", ret);
        }