public IActionResult CheckOut()
        {
            string id = User.Identities.First().Claims.Where(c => c.Type == ClaimTypes.Sid)
                        .Select(c => c.Value).SingleOrDefault();

            int userId = Convert.ToInt32(id);
            var model  = new BuyItemViewModel();

            model.BuyItems = _cartData.GetBuyItems(userId);
            return(View(model));
        }
        public IActionResult Index([FromForm] string title, string price)
        {
            List <BuyItem> items = new List <BuyItem>();
            var            item  = new BuyItem();

            item.Name  = title;
            item.Price = Convert.ToInt32(price);
            item.Count = 1;
            items.Add(item);

            var model = new BuyItemViewModel();

            model.BuyItems = items;
            return(View(model));
        }