private void BeforeSerialization()
{
Backgrounds = Backgrounds.GetCheckedChildrenClone();
Resolutions = Resolutions.GetCheckedChildrenClone();
Traits = Traits.GetCheckedChildrenClone();
Settings = Settings.GetCheckedChildrenClone();
Themes = Themes.GetCheckedChildrenClone();
Genres = Genres.GetCheckedChildrenClone();
}