public ActionResult Create(int id)
        {
            RegistrationCart cart = RegistrationCart.GetCart(this.HttpContext);

            cart.AddToCart(id);
            return(RedirectToAction("Index"));
        }
        //GET: ShoppingCart//AddToCart
        public ActionResult AddToCart(int id)
        {
            RegistrationCart cart = RegistrationCart.GetCart(this.HttpContext);

            cart.AddToCart(id);

            return(RedirectToAction("Index")); //redirects user to index page
        }