AsyncDolls.AsyncPumpScript.ConcurrentlyHandleMessages C# (CSharp) Method

        public async Task ConcurrentlyHandleMessages()
        {
            #region Cancellation AsAbove

            var tokenSource = new CancellationTokenSource();
            tokenSource.CancelAfter(TimeSpan.FromSeconds(1));
            var token = tokenSource.Token;

            #endregion

            var runningTasks = new ConcurrentDictionary<Task, Task>();

            var pumpTask = Task.Run(() =>
            {
                while (!token.IsCancellationRequested)
                {
                    #region Output

                    "Pumping...".Output();

                    #endregion

                    var runningTask = HandleMessage();

                    runningTasks.TryAdd(runningTask, runningTask);

                    runningTask.ContinueWith(t =>
                    {
                        #region Output

                        "... done".Output();

                        #endregion

                        Task taskToBeRemoved;
                        runningTasks.TryRemove(t, out taskToBeRemoved);
                    }, TaskContinuationOptions.ExecuteSynchronously);
                }
            });

            await pumpTask.ConfigureAwait(false);

            #region Output

            "Pump finished".Output();

            #endregion

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

            #region Output

            "All receives finished".Output();

            #endregion

            tokenSource.Dispose();
        }