OK so I want to subclass ObservableCollection to add a property to it. Unfortunately the PropertyChanged event is protected. Basically I want to subcla
ObservableCollection
PropertyChanged
The UI can and does get notified. This is a restriction JUST with ObservableCollection, which defines the PropertyChanged event as protected.
FWIW, I think you're better off leaving ObservableCollection alone and just adding another property to your VM.