具有异步顺序任务 C# 的任务计划程序

我正在异步执行一些.py脚本。执行一个脚本大约需要 30 秒。可能会在两到三秒的时间跨度内选择两个甚至多个脚本。目标是拥有一个调度程序，它收集所有任务并一个接一个地执行它们。应包括先进先出功能。我尝试了以下代码只是为了尝试队列任务计划程序的功能，但即使这样也不起作用。

QueuedTaskScheduler queueScheduler;
private TaskScheduler ts_priority1;
int pos = 0;
        public Form1()
    {
        InitializeComponent();
        queueScheduler = new QueuedTaskScheduler(targetScheduler: TaskScheduler.Default, maxConcurrencyLevel: 1);
        ts_priority1 = queueScheduler.ActivateNewQueue(1);
    }
        private void button3_Click(object sender, EventArgs e)
    {
        QueueValue(pos, ts_priority1);
        pos++;
    }
    private void button4_Click(object sender, EventArgs e)
    {
        changeString(pos);
        pos++;
    }
    private void changeString (int position)
    {
        var bea = "This is Thread " + position + " starting";
        MethodInvoker Labelupdate = delegate
        {
            label2.Text = bea;
        };
        Invoke(Labelupdate);
        Thread.Sleep(3000);
        bea = "Thread " + position + " is ending";
        MethodInvoker Labelupdate1 = delegate
        {
            label2.Text = bea;
        };
        Invoke(Labelupdate1);
        Thread.Sleep(1000);
    }
    private void updateLabel (string Lab)
    {
        MethodInvoker Labelupdate = delegate
        {
            label2.Text = Lab;
        };
        Invoke(Labelupdate);
    }
    private Task QueueTask(Func<Task> f, TaskScheduler ts)
    {
        return Task.Factory.StartNew(f, CancellationToken.None, TaskCreationOptions.HideScheduler | TaskCreationOptions.DenyChildAttach, ts);
    }
    private Task QueueValue(int position, TaskScheduler ts)
    {
        return QueueTask(async () =>
        {
            label2.Text = "This is Thread " + position + " starting";
            Thread.Sleep(3000);
            label2.Text = "Thread " + position + " is ending";
            Thread.Sleep(1000);
        }, ts);
    }

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);
    }