void SetupSfxFile()
{
var dir = ServiceLocator.FileStorage.GetDirectoryName(vm.Game.Path);
_sfxFilename = (from filename in new[] { vm.Game.Id + ".sou", "monster.sou" }
let path = ScummHelper.NormalizePath(ServiceLocator.FileStorage.Combine(dir, filename))
where path != null
select path).FirstOrDefault();
}