public Task Unsubscribe(Type eventType, ContextBag context) { var topicsToUnsubscribe = GetTypeHierarchy(eventType); var consumer = messagePump.GetEventsConsumerHolder().GetConsumer(); var subscriptionList = consumer.Subscription; subscriptionList = subscriptionList.Where(t => !topicsToUnsubscribe.Contains(t)).ToList(); consumer.AddSubscriptions(subscriptionList); return(Task.FromResult(0)); }