因為 Json.net 是有附原始碼的，他也附了單元測試的專案，底下是我額外增加的UnitTest，我的目標就是讓底下的測試可以pass，而且原來的Test 也要都能通過。

ValueTypeTest.cs

using System;
using NUnit.Framework;

namespace Newtonsoft.Json.Test {
	[TestFixture]
	public class ValueTypeTest {
		[Test]
		void NullTest() {			
			string jsonText = JavaScriptConvert.SerializeObject(null);
			object obj = JavaScriptConvert.DeserializeObject<Object>(jsonText);			
			Console.WriteLine(jsonText);
			Assert.IsNull(obj);
		}
		[Test]
		void StringTest() {
			string jsonText = JavaScriptConvert.SerializeObject("hello world");
			object obj = JavaScriptConvert.DeserializeObject<object>(jsonText);
			Console.WriteLine(jsonText);
			Assert.AreEqual(obj,"hello world");
		}
		[Test]
		void IntegerTest() {
			string jsonText = JavaScriptConvert.SerializeObject(1234);
			int n = JavaScriptConvert.DeserializeObject<int>(jsonText);
			Console.WriteLine(jsonText);
			Assert.AreEqual(n,1234);
		}
		[Test]
		void DateTimeTest() {
			new DateTime(2007,7,22,12,4,55));
			DateTime dtime = JavaScriptConvert.DeserializeObject<DateTime>(jsonText);
			Console.WriteLine(jsonText);
			Assert.AreEqual(dtime,void BooleanTest() {
			true);
			bool bVal = JavaScriptConvert.DeserializeObject<bool>(jsonText);
			Console.WriteLine(jsonText);
			Assert.AreEqual(bVal,255);">string jsonText2 = JavaScriptConvert.SerializeObject(false);
			bool bVal2 = JavaScriptConvert.DeserializeObject<bool>(jsonText2);
			Console.WriteLine(jsonText2);
			Assert.AreEqual(bVal2,255);">false);
		}
		[Test]
		void FloatTest() {
			string jsonText = JavaScriptConvert.SerializeObject(12345.68F);
			float fVal = JavaScriptConvert.DeserializeObject<float>(jsonText);
			Console.WriteLine(jsonText);
			Assert.AreEqual(fVal,12345.68F);
		}
		[Test]
		void EnumTest() {
			string jsonText = JavaScriptConvert.SerializeObject(StoreColor.White);
			StoreColor color = JavaScriptConvert.DeserializeObject<StoreColor>(jsonText);
			Console.WriteLine(jsonText);
			Assert.AreEqual(color,StoreColor.White);
		}
	}
}

開始看code後，發現比想像中的簡單，失敗的原因是作者有檢查且擋掉，或許這不是 bug 而是 by design 吧

JsonSerializer.cs,line:406-407

修改前:
if (value == null)
throw new ArgumentNullException("value");

修改後:
//if (value == null)
// throw new ArgumentNullException("value");

JsonWriter.cs,line104

修改前:
/* Value */{ State.Error,State.Object,State.Error,State.Array,State.Error },

修改後:/* Value */{ State.Closed,