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

            string ret = asInterface.MethodReturnOneArg("Hello world");

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