public static IEnumerable <BaseMulti> GetEnumeratedMultis(this Region region)
{
List <BaseMulti> list = region.GetMultis();
IEnumerable <BaseMulti> e;
lock (_MultiLock)
{
e = list.AsParallel().Where(m => m != null && m.GetRegion().IsPartOf(region));
}
foreach (BaseMulti multi in e)
{
yield return(multi);
}
list.Clear();
list.TrimExcess();
}
