When Clearing an ObservableCollection, There are No Items in e.OldItems

Question

I have something here that is really catching me off guard.

I have an ObservableCollection of T that is filled with items. I also have an event handler attached to t

Answer 1

To keep it simple why don't you override the ClearItem method and do whatever you want there ie Detach the items from the event.

public class PeopleAttributeList : ObservableCollection,    {
{
  protected override void ClearItems()
  {
    Do what ever you want
    base.ClearItems();
  }

  rest of the code omitted
}

Simple, clean, and contain within the collection code.