Greetings Frans,

I was wondering, why you doesn't the BeforeRemove event of the the EntityCollectionBase2 take a (CancelEventArgs) parameter instead of (EventArgs) specially that this is as per the Ms-Guidelines for Framework design??

I never considered it. But in v2 a lot of these events will be redesigned and a lot of them will be added, including cancel options.

Though I have to say: what should happen when the cancel is set: an exception or should the remove just be a no-op ?

Reading through the (Framework Design Guidelines) book, they recommend that in such a case its just a no-op and that the AfterEvent should NOT fire also (so if we cancel the BeforeRemove the item is NOT removed from the list and hence the listChanged event would NOT fire..)

Ok thanks