WinForms start thread that can access the GUI

using System.Threading;
 
private void btnStart_Click(object sender, EventArgs e)
{
    Thread t = new Thread(new ThreadStart(this.AsyncGetResults));
    t.Start();
}
 
private void AsyncGetResults()
{
 
    // Do some not-GUI-touching stuff 
    // ...
 
    // So some GUI-touching stuff
    if (panellWait.InvokeRequired)
    {
        panelWait.Invoke(new MethodInvoker(delegate
        {
            panelWait.Visible = true;
        }));
    }
 
    // Do some other not-GUI-touching stuff 
    // ...
}