C# EventHandler 委托

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace EventHandlerTest
{
class Program
{
//委托
public delegate void EventHandler(string a);
//事件
public static event EventHandler SetCode;
static void Main(string[] args)
{
//注册
Program.SetCode += GetCode;
//触发
SetCode("触发");
}

public static void GetCode(string s)
{
Console.WriteLine(s);
}
}
}