// create order
OrderInfo order = new OrderInfo(int.MinValue, DateTime.Now, User.Identity.Name, GetCreditCardInfo(), billingForm.Address, shippingForm.Address, Profile.ShoppingCart.Total, Profile.ShoppingCart.GetOrderLineItems(), null);

// insert
Order newOrder = new Order();
newOrder.Insert(order);

/// <summary>
        /// A method to insert a new order into the system
        /// As part of the order creation the inventory will be reduced by the quantity ordered
        /// </summary>
        /// <param name="order">All the information about the order</param>
        public void Insert(OrderInfo order)
        {

            // Call credit card procesor
            ProcessCreditCard(order);

            // Insert the order (a)synchrounously based on configuration
            orderInsertStrategy.Insert(order);
        }

        /// <summary>
        /// Process credit card and get authorization number. 
        /// </summary>
        /// <param name="order">Order object, containing credit card information, total, etc.</param>
        private void ProcessCreditCard(OrderInfo order)
        {

            // In the real life environment here should be a call to the credit card processor API.
            // We simulate credit card processing and generate an authorization number.
            Random rnd = new Random();
            order.AuthorizationNumber = (int)(rnd.NextDouble() * int.MaxValue);

            // Check if authorisation succeded
            if (!order.AuthorizationNumber.HasValue)
                throw new ApplicationException(CREDIT_CARD_ERROR_MSG);
        }