public async Task AddressAndPayment()

in Hands-on lab/lab-files/src/src/PartsUnlimitedWebsite/Controllers/CheckoutController.cs [58:109]
43 lines of code
5 McCabe index (conditional complexity)

        public async Task<IActionResult> AddressAndPayment(Order order)
        {
            var formCollection = await HttpContext.Request.ReadFormAsync();

            try
            {
                if (string.Equals(formCollection["PromoCode"].FirstOrDefault(), PromoCode,
                    StringComparison.OrdinalIgnoreCase) == false)
                {
                    return View(order);
                }
                else
                {
                    order.Username = HttpContext.User.Identity.Name;
                    order.OrderDate = DateTime.Now;

                    //Add the Order
                    _db.Orders.Add(order);
                    await _db.SaveChangesAsync(HttpContext.RequestAborted);

                    //Process the order
                    var cart = ShoppingCart.GetCart(_db, HttpContext);
                    cart.CreateOrder(order);                  

                    // Save all changes
                    await _db.SaveChangesAsync(HttpContext.RequestAborted);

                    try
                    {
                        string connectionString = Configuration[ConfigurationPath.Combine("ConnectionStrings", "StorageConnectionString")];
                        QueueClient queueClient = new QueueClient(connectionString, "orders");
                        queueClient.CreateIfNotExists();
                        if (queueClient.Exists())
                        {
                            var plainTextBytes = System.Text.Encoding.UTF8.GetBytes(order.OrderId.ToString());
                            queueClient.SendMessage(System.Convert.ToBase64String(plainTextBytes));
                        }
                    }
                    catch (Exception ex)
                    {
                        return View("Error");
                    }

                    return RedirectToAction("Complete",
                        new { id = order.OrderId });
                }
            }
            catch (Exception ex)
            {
                return View("Error");
            }
        }