/// <summary>

        /// 根据cookie名称删除

        /// </summary>

        /// <param name="cookieName"></param>

        public void ExpireCookie(string cookieName)

        {

            HttpCookie cookie = HttpContext.Current.Request.Cookies[cookieName];

            if (cookie != null)

            {

                cookie.Expires = DateTime.Now.AddDays(-2);

                cookie.Domain = ".xilu.com";

                HttpContext.Current.Response.Cookies.Set(cookie);

            }

            //FileAddEveryDay(path, "根据cookie名称删除:" + cookieName, true);

            //HttpContext.Current.Response.Cookies.Remove(cookieName);

        }