Don't assert if one of the event sink does not implement OnPropertyChanged.
Don't assert if one of the event sink does not implement OnPropertyChanged.

zooba/PTVS,int19h/PTVS,int19h/PTVS,int19h/PTVS,zooba/PTVS,zooba/PTVS,zooba/PTVS,int19h/PTVS,int19h/PTVS,int19h/PTVS,zooba/PTVS,zooba/PTVS