elmah.ir-post128-code2.cs

public Guid PlaceOrder(Guid customerId, ShoppingCart shoppingCart)
{
    foreach (var item in shoppingCart.Items)
    {
        if (item.Quantity == 0)
        {
            throw new InvalidOrderException();
        }
    }

    var customer = _customerService.GetCustomer(customerId);

    PlaceOrderWithFulfillmentService(shoppingCart, customer);

    var order = new Order();
    return _orderDataService.Save(order);
}

private void PlaceOrderWithFulfillmentService(ShoppingCart shoppingCart, Customer customer)
{
    //Open Session
    var orderFulfillmentSessionId = _orderFulfillmentService.OpenSession(USERNAME, PASSWORD);

    var firstItemId = shoppingCart.Items[0].ItemId;
    var firstItemQuantity = shoppingCart.Items[0].Quantity;

    //Check Inventory Level
    var itemIsInInventory = _orderFulfillmentService.IsInInventory(orderFulfillmentSessionId, firstItemId, firstItemQuantity);

    //Place Orders
    var orderForFulfillmentService = new Dictionary();
    orderForFulfillmentService.Add(firstItemId, firstItemQuantity);
    var orderPlaced = _orderFulfillmentService.PlaceOrder(orderFulfillmentSessionId,
        orderForFulfillmentService,
        customer.ShippingAddress.ToString());

    //Close Session
    _orderFulfillmentService.CloseSession(orderFulfillmentSessionId);
}