Start app without windows?

I want create ask dialog and then do any action. Show\ShowDialog methods only asynchronic, no idea, how to do it and dont close app. Where “ShutdownMode” analog with “OnExplicitShutdown” value from WPF?

    static void Main(string[] args)
    {
      InitializeLogging();
      AppBuilder.Configure<App>()
          .UsePlatformDetect()
          .SetupWithoutStarting();

      var dialog = new SimpleDialog();
      // Cannot await, Main not async
      var dialogResult = await dialog.ShowDialog();
      ...
    }

[Gillibald]

I will introduce ShutdowmMode soon. That is next in my list.

[Gillibald]

You don’t run the Application anywhere. That wouldn’t work with WPF either.