C# calling form.show() from another thread

Question

if I call form.show() on a WinForms object from another thread, the form will throw an exception. Is where any way I can add a new, visible form to the main ap

Answer 1

If your use case is to display a GUI while the Main GUI Thread is busy (like loading bar) you can do the following:

private void MethodWithLoadingBar()
{
    Thread t1 = new Thread(ShowLoading);
    t1.Start();
    // Do the Main GUI Work Here
    t1.Abort();
}

private void ShowLoading()
{
    Thread.Sleep(1000); //Uncomment this if you want to delay the display 
                        //(So Loading Bar only shows if the Method takes longer than 1 Second)
    loadingGUI = new LoadingGUI();
    loadingGUI.label1.Text = "Try to Connect...";
    loadingGUI.ShowDialog();
}

My LoadingGUI is a simple Form with a public Label and a ProgressBar with Style set to Marquee