Hi!

It looks like there's a bug in the wiring up of .NET event handlers in TeaCommerce. The ITeaCommerceExtension.Initialize() method is only called when orders are manipulated from the shop frontend - not when accessing the backend administration interface.

Steps to reproduce:

1. Create a simple ITeaCommerceExtension and hook up to the events.

    public class EventWireUpTestHandler : ITeaCommerceExtension {
        public void Initialize() {
            // set a breakpoint here
            var debug = true;

            WebshopEvents.OrderLineChanged += WebshopEvents_OrderLineChanged;
            WebshopEvents.OrderStatusChanged += WebshopEvents_OrderStatusChanged;
        }

        void WebshopEvents_OrderLineChanged(Order order, OrderLine orderLine) {
            // set a breakpoint here
            var debug = true;
        }

        void WebshopEvents_OrderStatusChanged(Order order, OrderStatus status) {
            // set a breakpoint here
            var debug = true;
        }
    }

2. Set breakpoints in the Initialize() method and in the two event handlers and attach a debugger to the web application.

3. Go to the admin interface and change the status of an existing order (e.g. from "New" to "Completed"). The breakpoint in WebshopEvents_OrderStatusChanged() is not triggered, nor is the one in Initialize().

4. Go to the frontend and add an item to the basket. The breakpoints in Initialize() and in WebshopEvents_OrderLineChanged() are both triggered.

5. Go back to the admin interface and change the status of an existing order. This time the breakpoint in WebshopEvents_OrderStatusChanged() is triggered correctly.

This issue is kind of critical, since the web application is not necessarily wound up by visitors adding items to the basket - especially not on a low traffic site. In case an administrator ends up winding the application up and starts managing orders, the event handling (in my case: pushing completed orders to an external system) is not performed for these orders.

Note: I'm using the 1.4.1.0 beta version of TeaCommerce.