c#泛型学习(二)_C#教程

53 {

54 if (t is int) { }

55 if (t is LinkedList<int, string>) { }

56 string str = t as string;

57 if (str != null) { }

58 LinkedList<int, string> list = t as LinkedList<int, string>;

59 if (list != null) { }

60 }

61 }

62 #endregion

63

64}

65

2.继承和泛型

1using System;

2using System.Collections.Generic;

3using System.Text;

4

5namespace VS2005Demo2

6{

7 继承和泛型#region 继承和泛型

8 public class BaseClass<T>

9 { }

10 public class SubClass : BaseClass<int>

11 { }

12

13

14 public class SubClass1<R> : BaseClass<R>

15 { }

16 #endregion

17

18 继承约束#region 继承约束

19 public class BaseClass1<T> where T : ISomeInterface

20 { }

21 public class SubClass2<T> : BaseClass1<T> where T : ISomeInterface

22 { }

23

24 //构造函数约束

25 public class BaseClass3<T> where T : new()

26 {

27 public T SomeMethod()

28 {

29 return new T();

30 }

31 }

32 public class SubClass3<T> : BaseClass3<T> where T : new()

33 { }

34

35 #endregion

36

37 虚拟方法#region 虚拟方法

38 public class BaseClass4<T>

39 {

40 public virtual T SomeMethod()

41 {