public ActionResult AddToCart(int id) { Product p = pr.FindProductById(id); if (Request.Cookies["registered"] != null) { string ownerid = Request.Cookies["registered"]["UserName"]; int userid = ur.FindOwnerId(ownerid); pr.AddToCart(p, userid); } else { Session["cart"] = new List <Product>(); ((List <Product>)Session["cart"]).Add(p); pr.AddToCart(p); } return(RedirectToAction("Index", "Home")); }