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 参数委托
10     public delegate void MyFirst(int num);
11     class Program
12     {
13         static void Main(string[] args)
14         {
15             MyFirst helloWorld = delegate (int number) { Console.WriteLine(number); };
16             helloWorld(10);
17             Console.ReadKey();
18         }
19     }
20 }