delegate 委托

 1     class Program
 2     {
 3         static void Main()
 4         {
 5             Class1 c1 = new Class1();
 6             c1.Start();
 7         }
 8     }
 9 
10     class Class1
11     {
12         public static void Hello()
13         {
14             Console.WriteLine("Hello");
15         }
16 
17         public void Start()
18         {
19             Class2 c2 = new Class2();
20             c2.Show(Hello);
21         }
22     }
23 
24     delegate void de();
25 
26     class Class2
27     {
28         public void Show(de d)
29         {
30             d();
31         }
32     }