asp.net委托事件

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Text;
using netpublic;
using System.Data.SqlClient;
public partial class test1 : System.Web.UI.Page
{
    public class cz
    {
        public delegate void CustomEventHandler(object sender, EventArgs e);//
        public event EventHandler Load;
        public void onLoad()
        {
   
            Load(this, EventArgs.Empty);
        }

    }
    protected void Page_Load(object sender, EventArgs e)
    {
 
        cz m=new cz();
  
        m.Load+=new EventHandler(m_Load);
        m.onLoad();
  
    }
    void m_Load(object sender, EventArgs e)
    {
        Response.Write("<script>alert(' this is a class event')</script>");

    } 
}