protected virtual void OnOrderItemAdded(ItemCollectionEventArgs eventArgs) { OrderItemAdded.Invoke(this, eventArgs); }
protected virtual void OnOrderItemAdded(object sender, ModifyElementEventArgs <T> e) { OrderItemAdded?.Invoke(this, e); }
////} protected virtual void OnOrderItemAdded(OrderItemAddedEventArgs e) { OrderItemAdded?.Invoke(this, e); }