public static IEnumerable <IranState> GetProvinces(ProvinceType type)
{
if (type.HasFlag(ProvinceType.Province))
{
foreach (var prov in Provinces)
{
yield return(prov);
}
}
if (type.HasFlag(ProvinceType.Island))
{
foreach (var prov in Islands)
{
yield return(prov);
}
}
}
