public async Task RemoveFromCart()

in PartsUnlimited-aspnet45/src/PartsUnlimitedWebsite/Controllers/ShoppingCartController.cs [101:150]
34 lines of code
2 McCabe index (conditional complexity)

        public async Task<ActionResult> RemoveFromCart([FromUri] int id)
        {

            // Start timer for save process telemetry
            var startTime = DateTime.Now;

            // Retrieve the current user's shopping cart
            var cart = ShoppingCart.GetCart(db, HttpContext);

            // Get the name of the product to display confirmation
            var cartItem = db.CartItems.Include("Product").Single(item => item.CartItemId == id);
            string productName = cartItem.Product.Title;

            // Remove from cart
            int itemCount = cart.RemoveFromCart(id);

            await db.SaveChangesAsync(CancellationToken.None);

            string removed = (itemCount > 0) ? " 1 copy of " : string.Empty;

            // Trace remove process
            var measurements = new Dictionary<string, double>()
            {
                {"ElapsedMilliseconds", DateTime.Now.Subtract(startTime).TotalMilliseconds }
            };
            telemetry.TrackEvent("Cart/Server/Remove", null, measurements);

            // Display the confirmation message
            var items = cart.GetCartItems();
            var itemsCount = items.Sum(x => x.Count);
            var subTotal = items.Sum(x => x.Count * x.Product.Price);
            var shipping = itemsCount * (decimal)5.00;
            var tax = (subTotal + shipping) * (decimal)0.05;
            var total = subTotal + shipping + tax;

            var results = new ShoppingCartRemoveViewModel
            {
                Message = removed + productName +
                    " has been removed from your shopping cart.",
                CartSubTotal = subTotal.ToString("C"),
                CartShipping = shipping.ToString("C"),
                CartTax = tax.ToString("C"),
                CartTotal = total.ToString("C"),
                CartCount = itemsCount,
                ItemCount = itemCount,
                DeleteId = id
            };

            return Json(results);
        }