public ChannelNotifier(PeerCastApplication app)
{
this.app = app;
this.messageExpireTimer.Start();
this.app.PeerCast.ChannelAdded += (sender, args) => {
args.Channel.Closed += OnChannelClosed;
};
this.app.PeerCast.ChannelRemoved += (sender, args) => {
args.Channel.Closed -= OnChannelClosed;
};
}