c# Windows窗体-更新toolStripLabel文本返回可自动滚动面板到顶部

我设置了以下表单:

https://i.stack.imgur.com/CuwCP.png(我不能发布图片，因为这个帐户是新的)

每当我更新带下划线的ToolStripLabel文本时，滚动条就会返回顶部，如下所示:

https://i.stack.imgur.com/9yZu3.png

这是编辑ToolStripLabel的代码。文本:

private void OnTimedEvent(object source, EventArgs e)//requests data
{
    try
    {
        if (commTool != null)
        {
            pollTimer.Stop();
            commTool.Poll();
            writeRequests(commTool.PollCount.ToString());
            if (!stopTimer)
            {
                pollTimer.Start();
            }
            if (errorRate < 0.25)
            {
                setColour(Color.Green);
            }
            else if (errorRate > 0.25 && errorRate < 0.5)
            {
                setColour(Color.GreenYellow);
            }
            else if (errorRate > 0.5 && errorRate < 0.75)
            {
                setColour(Color.Yellow);
            }
            else
            {
                setColour(Color.Red);
            }
        }
        else
        {
            Console.WriteLine("Error MainMenu.cs, OnTimedEvent(): commTool = null");
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine("Error MainMenu.cs, OnTimedEvent(): " + ex.ToString());
    }
}
public void writeRequests(string pollCount)
{
    requests = commTool.PollCount;
    if (statusBar.InvokeRequired)
    {
        SetTextCallback d = new SetTextCallback(writeRequests);
        Invoke(d, new object[] { pollCount });
    }
    else
    {
        tsLblRequests.Text = "Requests: " + pollCount;
    }
}