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;
public partial class example : System.Web.UI.Page
谁能学学,上边的能引用的空间命名的,功能,作用是什么,最好每行都说说,谢谢呀