public int RemoveFromCart(PieDto pie)
        {
            var shoppingCartItem = _Context.ShoppingCartItems.SingleOrDefault(c => c.pie.Id == pie.Id && c.ShoppingCartId == ShoppingCartId);
            var localAmount      = 0;

            if (shoppingCartItem.Amount > 1)
            {
                shoppingCartItem.Amount--;
                localAmount = shoppingCartItem.Amount;
            }
            else
            {
                _Context.ShoppingCartItems.Remove(shoppingCartItem);
            }
            _Context.SaveChanges();

            return(localAmount);
        }
        public void AddCart(PieDto pie, int amount)
        {
            var shoppingCartItem = _Context.ShoppingCartItems.SingleOrDefault(c => c.pie.Id == pie.Id && c.ShoppingCartId == ShoppingCartId);

            if (shoppingCartItem == null)
            {
                shoppingCartItem = new ShoppingCartItemDto
                {
                    ShoppingCartId = ShoppingCartId,
                    pie            = pie,
                    Amount         = 1
                };
                _Context.ShoppingCartItems.Add(shoppingCartItem);
            }
            else
            {
                shoppingCartItem.Amount++;
            }

            _Context.SaveChanges();
        }