cookies 删除为何还是能输出值

写入cookies 
 public void ModCookies()
    {        HttpCookie cookies = new HttpCookie("Porschev");
        cookies.Value = "ccccccccccccccc";
        cookies.Expires = DateTime.Now.AddMinutes(20);
        Response.Cookies.Add(cookies);
    }
删除cookies
 protected void Button2_Click(object sender, EventArgs e)
    {
        HttpCookie cookies = Request.Cookies["Porschev"];
        cookies.Expires = DateTime.Now.AddDays(-1000);
        Response.Cookies.Set(cookies);
        Request.Cookies.Remove("Porschev");
        Response.Write(cookies.Value);
    }
不是已经将cookies都给移除了吗 为何输出的还是   “ccccccccccccccc”