HttpCookie cookie = Request.Cookies["A"];
        
                if (cookie == null)
                {
                    cookie = new HttpCookie("A", "0");
                    cookie.Expires = DateTime.Now.AddDays(1);
                    cookie.Value = 45.ToString();
                    Response.AppendCookie(cookie);
                }
                else
                {
                    cookie.Value = (1 + int.Parse(cookie.Value)).ToString();
                }