public MainMenu()
{
Buttons = new StackPanel();
Buttons.HorizontalAlignment = HorizontalAlignment.Center;
AddButton("Start");
AddButton("Options");
AddButton("Exit");
var res = Settings.Default.Resolution;
Buttons.Position = new Vector2f((res.X - Buttons.GetBounds().Width) / 2, (res.Y - Buttons.GetBounds().Height) / 2);
}