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 int 类型参数的委托
10     public delegate void MyFirst(int num);
11     class Program
12     {
13         static void Main(string[] args)
14         {
15             MyFirst test1 = x => Console.WriteLine(x.ToString());
16             test1(1);
17 
18 
19             Console.ReadKey();
20         }
21     }
22 }