AsyncDolls.YourDolls.PushMessages.StopAsync C# (CSharp) Method

        public async Task StopAsync()
        {
            tokenSource.Cancel();

            await pumpTask.IgnoreCancellation().ConfigureAwait(false);
            await Task.WhenAll(runningTasks.Values).ConfigureAwait(false);

            runningTasks.Clear();
            semaphore.Dispose();
            tokenSource.Dispose();
        }
    }

        public async Task Do()
        {
            var messages = new ConcurrentQueue<TransportMessage>();
            messages.Enqueue(new TransportMessage());
            messages.Enqueue(new TransportMessage());
            messages.Enqueue(new TransportMessage());

            var countdown = new AsyncCountdownEvent(3);

            var chainFactory = new ChainFactory();
            chainFactory.Register(() => new DelayElement());
            chainFactory.Register(() => new LogElement());
            chainFactory.Register(() => new DecrementElement(countdown));

            var pushMessages = new PushMessages(messages, maxConcurrency: 1);

            await pushMessages.StartAsync(tm => Connector(chainFactory, tm));

            await countdown.WaitAsync();

            await pushMessages.StopAsync();
        }