Remove an item from an ObservableCollection in a CollectionChanged event handler

Question

I\'m hoping to be able to reject some items after they have been added to an ObservableCollection. I am not able to subclass the ObservableCollection or use any sort of view, s

Answer 1

Used this in the oncollectionchanged and it works (WPF and MVVM example):

new System.Threading.Thread(t =>
{
  Application.Current.Dispatcher.Invoke((Action)delegate
  {
    OnHoldMessages.Add(_selectedOnHoldMessage);
    RaisePropertyChanged(propertyName: "OnHoldMessages");
  });
}).Start();