1 class Action_Fun的委托用法
 2     {
 3         string Get1(int key, Func<int, string> acquire);
 4 
 5         string Get2(int key, Func<string> acquire);
 6 
 7         void Set1(int key, Action<string> acquire);
 8 
 9         void Set2(int key, Action acquire);
10 
11         /// <summary>
12         /// 一個(gè)輸入?yún)?shù)，一個(gè)返回值的Fun
13         /// </summary>
14         /// <returns></returns>
15         public string Fun1()
16         {
17             return Get1(1, a =>
18             {
19                 if (a == 1)
20                     return "ok";
21                 else
22                     return "fail";
23             });
24         }
25         /// <summary>
26         /// 只有返回值的Fun
27         /// </summary>
28         /// <returns></returns>
29         public string Fun2()
30         {
31             return Get2(1, () =>
32              {
33                  return "fail";
34              });
35 
36 
37         }
38         /// <summary>
39         /// 一個(gè)輸入?yún)?shù)的Action
40         /// </summary>
41         public void Action1(int a)
42         {
43             Set1(a, (i) => //1個(gè)參數(shù)時(shí)，擴(kuò)括號(hào)可以省略
44             {
45                 Console.WriteLine(i, a);
46             });
47         }
48 
49         /// <summary>
50         /// 沒(méi)有參數(shù)的Action
51         /// </summary>
52         public void Action2(int a)
53         {
54             Set2(a, () =>
55             {
56                 Console.WriteLine("您輸入的內(nèi)容是：{0}", a);
57             });
58         }
59     }