public Flow_asynchronously()
        {
            // Build
            var async = new Asynchronize<IMessage>();
            var throttle = new Throttle_message_flow();
            var handle_exception = new Handle_exception();
            _processMessage = new Process_message();

            Action<IMessage> enqueue = _ => async.Process(_, throttle.Process);

            // Bind
            throttle.Continue += handle_exception.Process;
            handle_exception.Continue += _processMessage.Process;
            handle_exception.UnhandledException += _ => UnhandledException(_);
            _process += enqueue;
            _processMessage.Message += _ => Message(_);
            _processMessage.Continue += enqueue;
            _processMessage.Result += _ => Result(_);
            _processMessage.UnhandledException += _ => UnhandledException(_);

            _execute += _processMessage.Execute;

            _start += async.Start;
            _stop += async.Stop;
            _throttle += throttle.Delay;
        }
        public Flow_asynchronously(ISchedulingStrategy schedule)
        {
            // Build
            var throttle = new Throttle_message_flow();
            var handle_exception = new Handle_exception();
            _processMessage = new Process_message();

            // Bind
            _process += schedule.ProcessExternalMessage;
            schedule.Result += throttle.Process;
            throttle.Continue += handle_exception.Process;
            handle_exception.Continue += _processMessage.Process;
            handle_exception.UnhandledException += _ => UnhandledException(_);
            _processMessage.Message += _ => Message(_);
            _processMessage.Continue += schedule.ProcessInternalMessage;
            _processMessage.Result += _ => Result(_);
            _processMessage.UnhandledException += _ => UnhandledException(_);

            _execute += _processMessage.Execute;

            _start += schedule.Start;
            _stop += schedule.Stop;
            _throttle += throttle.Delay;
        }