What is the right way to keep application running in background on Macos when window closing button is pressed?

[wl2776]

I'm a newbie in Macos development.

I'm trying to add the following feature to the Avalonia-based app: when application window is closed, it stays running, its window hides, its dock-icon has a dot below it, and its window shows again on click on the dock icon.

Currently I have managed to do the following: intercept OnClosing event and call Hide()

          protected override void OnClosing(WindowClosingEventArgs e) {
            var launcher = DataContext as ViewModels.Launcher;
            if (/* should stay in dock */) {
                e.Cancel = true;
                Hide();
            } else {
                launcher?.Quit(Width, Height);
            }
            base.OnClosing(e);
        }

However, if I choose Show all windows item in the dock icon right-click menu, I see an empty window with the message "No available windows"