public void should_serialize_null()
        {
            var instance = new ClassWithTypedStringValueLowerCaseWithoutAttribute();
            var json     = instance.ToJson();

            Assert.AreEqual("{ \"Value\" : null }", json);
        }
        public void should_serialize_lowercase()
        {
            var instance = new ClassWithTypedStringValueLowerCaseWithoutAttribute {
                Value = new TypedStringValueWithoutAttributeLowerCase("abc_123")
            };
            var json = instance.ToJson();

            Assert.AreEqual("{ \"Value\" : \"abc_123\" }", json);
        }