HttpCookie cookie_anonimo = new HttpCookie(FABC.AL.Variabili.CookieNameAnonymous, id_cookie_anonimo.ToString());
            cookie_anonimo.Expires = DateTime.Now.AddDays(60);
            HttpContext.Response.Cookies.Add(cookie_anonimo);

 var cookie_anonymous = HttpContext.Request.Cookies[FABC.AL.Variabili.CookieNameAnonymous];
                            cookie_anonymous.Expires = DateTime.Now.AddYears(-1);
                            cookie_anonymous.Value = null;
                            HttpContext.Request.Cookies.Add(cookie_anonymous);