public void Dispose()
{
// Use atomic exchange to ensure that Unsubscribe() is only called once,
// even if Dispose() is called simultaneously.
IObserver <T> observer = Interlocked.Exchange(ref _observer, null);
if (observer != null)
{
_subject.Unsubscribe(observer);
_subject = null;
}
}
public Subscription(WeakSubject <T> subject, IObserver <T> observer)
{
_subject = subject;
_observer = observer;
}