public void Publish <T>(object source, T message, Action <T> replyTo = null) { if (source == null || message == null) { return; } if (!_subscribers.ContainsKey(typeof(T))) { return; } var delegates = _subscribers[typeof(T)]; if (delegates == null || delegates.Count == 0) { return; } var payload = new MessagePayload <T>(message, source, replyTo); foreach (var handler in delegates.Select(item => item as Action <MessagePayload <T> >)) { Task.Factory.StartNew(() => handler?.Invoke(payload)); } }