static Settings()
{
Preferences.RegisterType <Level>
(
(n, o) => Preferences.HasPref(n) ? FileManagement.levels.First(p => p.Id == Preferences.Get <int>(n)) : o,
(n, v) => Preferences.Set(n, v.Id),
n => Preferences.Delete <ulong>(n)
);
Preferences.RegisterType <Pack>
(
(n, o) => Preferences.HasPref(n) ? FileManagement.packs.First(p => p.Id == Preferences.Get <int>(n)) : o,
(n, v) => Preferences.Set(n, v.Id),
n => Preferences.Delete <ulong>(n)
);
}