How to invoke into message loop after Application.Run()

Question

How can I invoke into the message loop of the tread/form after calling Application.Run() without a dialog? The reason is that I want to prepare (and later show) a dialog that is clickable even if a modal dialog is shown in the main application.

static Form1 dialog;

private static void CreateDialog(object obj)
{
    dialog = new Form1();
    Application.Run();
}

static void Main(string[] args)
{
    var thread = new Thread(CreateDialog);
    thread.Start();

    Thread.Sleep(2000);    //only for demonstration

    dialog.Invoke((Action)dialog.Show);    //InvalidOperationException: need window handle first
}

Answer 1

I found the solution here: https://stackoverflow.com/a/4411493/1520078 I just have to access the Handle property of the Form to be able to invoke it from now on.

private static void CreateDialog(object obj)
{
    dialog = new Form1();
    _ = dialog.Handle;
    Application.Run();
}

Now this does not throw any more:

dialog.Invoke((Action)dialog.Show);