Shell as ContentControl but Window.Activate() omitted?

[sigmarsson]

In a WPF application you initialized the application main window in the protected InitializeShell method. The Uno app beneath does not practice anything like that.

1. Is CreateShell supposed to create the main window out of the ContentControl in the example below?
2. I introduced the same shell - as the one the sample beneath - in my demo app but the main window is not showing up. How can i figure out why?
3. Is there a legitim reason the OnLaunched method is invoked multiple times during an Uno application start up?

CreateShell

Thank you.

[sigmarsson]

Still do not understand how they fabricate the main window. I set it up in one Prism related phase :

        protected override void InitializeShell(UIElement shell)
        {
#if WINDOWS
            Window = new Window();
            Window.Activate();
#else
            Window = Window.Current;
#endif
            Window.Content = shell;
        }