public void AddToCart(Album album)
        {
            // Get the matching cart and album instances
            var cartItem = _db.CartItems.SingleOrDefault(
                c => c.CartId == ShoppingCartId
                && c.AlbumId == album.AlbumId);

            if (cartItem == null)
            {
                // TODO [EF] Swap to store generated key once we support identity pattern
                var nextCartItemId = _db.CartItems.Any()
                    ? _db.CartItems.Max(c => c.CartItemId) + 1
                    : 1;

                // Create a new cart item if no cart item exists
                cartItem = new CartItem
                {
                    CartItemId = nextCartItemId,
                    AlbumId = album.AlbumId,
                    CartId = ShoppingCartId,
                    Count = 1,
                    DateCreated = DateTime.Now
                };

                _db.CartItems.Add(cartItem);
            }
            else
            {
                // If the item does exist in the cart, then add one to the quantity
                cartItem.Count++;

                // TODO [EF] Remove this line once change detection is available
                _db.Update(cartItem);
            }
        }
        public void AddToCart(Album album)
        {
            // Get the matching cart and album instances
            var cartItem = _db.CartItems.SingleOrDefault(
                c => c.CartId == ShoppingCartId
                && c.AlbumId == album.AlbumId);

            if (cartItem == null)
            {
                // Create a new cart item if no cart item exists
                cartItem = new CartItem
                {
                    AlbumId = album.AlbumId,
                    CartId = ShoppingCartId,
                    Count = 1,
                    DateCreated = DateTime.Now
                };

                _db.CartItems.Add(cartItem);
            }
            else
            {
                // If the item does exist in the cart, then add one to the quantity
                cartItem.Count++;
            }
        }