public IDisposable Subscribe(IPropNotify <T> observer)
{
if (!_observers.Contains(observer))
{
_observers.Add(observer);
}
return(new Unsubscriber(_observers, observer));
}
public Unsubscriber(List <IPropNotify <T> > observers, IPropNotify <T> observer)
{
_observers = observers;
_observer = observer;
}
