public ActionResult ADClick(int?id)
        {
            if (id == null)
            {
                return(RedirectToAction("Home"));
            }
            AD ad = db.ADS.Find(id);

            if (ad == null)
            {
                return(RedirectToAction("Home"));
            }
            db.ADClick(ad.ID);
            return(Redirect(ad.Link));
        }