Dock problem

gistfile1.txt

public class SplashView : BaseWindow
{
    public override void Show(Shell target)
    {           
        var bg = new ImageControl();
        bg.Texture = "Media/splash.png";
        //bg.Size = target.Size;
	bg.Dock = DockStyle.Fill;
        Controls.Add(bg);	

	base.Show(target);
    }
}

public class BaseWindow : Window
{
	public override void Show(Shell target)
	{
		var label = new Label();
		label.Size = new Point(240, 20);
		label.Position = new Point(0, 100);
		//label.Dock = DockStyle.Center;
		label.Style = "footer";
		label.Text = $"v1.0.1 Powered by Pay Insights - TI Pagos";
		Controls.Add(label);

		base.Show(target);
	}
}
//aka the Desktop class just renamed
public class AppShell : Shell
{
  
}
  
private static Skin GetSkin() 
{
	var skin = new Skin();

	var footStyle = new ControlStyle();
	footStyle.TextColor = ColorInt.RGB(255, 0, 0);
	footStyle.Font = "20|LaoUI.ttf";
	footStyle.TextAlign = Alignment.MiddleCenter;

	skin.Add("footer", footStyle);

	return skin;
}

I don't see the BaseWindow/Window getting a proper size assigned anywhere :)
Make sure you give your window a good size - then docking should work.