1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 using System.Threading.Tasks;
 6 
 7 namespace ConsoleApplication2
 8 {
 9     //返回类型为void的无参数委托
10     public delegate void MyFirst();
11     class Program
12     {
13         static void Main(string[] args)
14         {
15             MyFirst helloWorld = delegate () { Console.WriteLine("hello world"); };
16             helloWorld();
17             Console.ReadKey();
18         }
19     }
20 }