public GarbageRegistrationKey(EventListenerBase listener, IGarbageSink sink)
{
Listener = listener;
Sink = sink;
}
/// <summary>
/// Registers a garbage sink with the listener without activating.
/// </summary>
/// <param name="sink">the sink to register</param>
/// <returns>A registration key for the sink</returns>
/// <remarks>Sinks will not begin to recieve garbage notification
/// until <em>after</em> the registration key's <em>Activate</em>
/// method is called.</remarks>
public ISinkRegistrationKey RegisterGarbageSink(IGarbageSink sink)
{
if (sink == null) throw new ArgumentNullException("sink");
GarbageRegistrationKey key = new GarbageRegistrationKey(this, sink);
Util.LazyInitializeWithLock(ref _garbageNotifier, _notifierLock)
.AddRegistration(key);
return key;
}
