delegate

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.Collections.Generic;

using System.Text;

// N:1调用
public delegate void DataChangedHandler(int increment);
// 操作实现，定义了数据计算方法
public class CounterOperaotr
}