统一处理同一网页下多个相同控件相同事件？该怎么解决

统一处理同一网页下多个相同控件相同事件？
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.IO;
using System.Data.SqlClient;

public partial class 主界面 : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
  string temp= Process.UserNameString;
  UserName.Text = Process.UserNameString;
  foreach (Control PageCtrl in form1.Controls)
  {
  if (PageCtrl is LinkButton)
  {
  PageCtrl.Click += new EventHandler(LinkButton_Click);//这里说没有Click 为什么
  }
   
  }
  }

  void LinkButton_Click(object sender, EventArgs e)
  {
  ((LinkButton)sender).Text = Process.RestaurantString;
  Response.Redirect("食堂界面.aspx");
  }


[解决办法]
应该这样：
foreach (Control PageCtrl in form1.Controls)
{
if (PageCtrl is LinkButton)
{
LinkButton l = (LinkButton)PageCtrl;
l.Click += new EventHandler(LinkButton_Click);
}
}
[解决办法]
楼上正解，但是这样写我觉得比较好：
foreach (Control PageCtrl in form1.Controls)
{
if (PageCtrl is LinkButton)
{
LinkButton l = PageCtrl as LinkButton;
l.Click += new EventHandler(LinkButton_Click);
}
}