asp.net如何刪除cookie

要刪除cookie值，要如何動手做呢？

以Ｃ#為例

//先判斷是否有名為UserSettings的cookie存在
if (Request.Cookies["UserSettings"] != null)
{　
    HttpCookie myCookie = new HttpCookie("UserSettings");//取得cookie    
    myCookie.Expires = DateTime.Now.AddDays(-1d);//設定cookie的到期日為已過期　
    Response.Cookies.Add(myCookie);//將cookie變動寫回client端
}

出處：How To : Delete a cookie