How to receive and send Black Box responses

C#            
            Channel.BlackBox.Get<Channel.BlackBox.Message.Question>().Subscribe(question =>
            {
                // create response from first one available
                var response = question.CreateResponse(question.AvailableResponses.First());
                Channel.BlackBox.Publish(response);
            });

            Channel.BlackBox.Get<Channel.BlackBox.Message.Notification>().Subscribe(message =>
            {
                // just send OK response.
                var response = message.CreateResponse(BlackBoxMessageButtons.Ok);
                Channel.BlackBox.Publish(response);
            });