TaskScheduler with async sequential Tasks C#

Question

I am executing some .py scripts async. One Script takes about 30 seconds to be executed. It could happen that two or even more Scripts are being selected in a timespan of two or

Answer 1

I solved it. There is only need of a Semaphore. It is the same way as in this Thread Here is the Code:

private static SemaphoreSlim semaphore = new SemaphoreSlim(1);
 private Task QueueValue(int position, TaskScheduler ts)
    {
        return QueueTask(async () =>
        {
            await semaphore.WaitAsync();
            try
            {
                var at = "This is Thread " + position + " starting";
                updateLabel(at);
                await Task.Delay(3000);
                at = "Thread " + position + " is ending";
                updateLabel(at);
                await Task.Delay(1000);
            }
            finally
            {

                semaphore.Release();
            }

        }, ts);
    }

Many thanks!