public override int ToFourDigitYear(int year) {
if (year <= 0) {
throw new ArgumentOutOfRangeException("year",
Environment.GetResourceString("ArgumentOutOfRange_NeedPosNum"));
}
if (year > helper.MaxYear) {
throw new ArgumentOutOfRangeException(
"year",
String.Format(
CultureInfo.CurrentCulture,
Environment.GetResourceString("ArgumentOutOfRange_Range"),
1,
helper.MaxYear));
}
return (year);
}