//Default.aspx 
     protected void Page_Load(object sender, EventArgs e) 
     { 
       string metaformatstring = " <meta http-equiv='refresh' content='.8;url=Default.aspx?key={0}' /> "; 
       string scrollformatstring = "  <span style='font-size:xx-large;'>{0} </span>"; 
       int pagekey = 0; 
       int.TryParse(Request.QueryString["key"], out pagekey); 
       pagekey++; 
       Random r = new Random((int)DateTime.Now.Ticks); 
       int luckynumber = r.Next(10); 
       if (pagekey  < 100) 
         Response.Write(string.Format(metaformatstring, pagekey) + string.Format(scrollformatstring, luckynumber)); 
       else 
         Response.Write(string.Format(scrollformatstring, luckynumber) + "幸运号已出"); 
       Response.Flush(); 
       Response.End(); 
     }