c# 笔记cookie

　　　　　　　　　if (Request.Cookies["svpoint"] != null)
                {
                    Request.Cookies["svpoint"].Value = lst[].s_SvcID.ToString();
                }
                else
                {
                    HttpCookie aCookie = new HttpCookie("svpoint");
                    aCookie.Value = lst[].s_SvcID.ToString();
                    aCookie.Expires = DateTime.Now.AddDays();
                    Response.Cookies.Add(aCookie);
                }