値タイプと参照タイプの簡単なテストは、あまり理論がなく、一目瞭然です.

 1     [TestClass]

 2     public class HomeControllerTest

 3     {

 4         [TestMethod]

 5         public void ZhiTest()

 6         {

 7             int a = 10;

 8             Zhi(a);

 9             Assert.AreEqual(11, a);

10         }

11         public void Zhi(int a)

12         {

13             a++;

14         }

15 

16         [TestMethod]

17         public void YinyongTest()

18         {

19             List<int> list = new List<int>();

20             Yinyong(list);

21             Assert.AreEqual(1, list[0]);

22         }

23         public void Yinyong(List<int> list)

24         {

25             list.Add(1);

26         }

27 

28     }