public DateTimeParts(DateParts dateParts, TimeParts timeParts)
{
_date = dateParts;
_time = timeParts;
}
public DateTimeParts(int year, int month, int day, int hour, int minute, int second, int millisecond, DateTimeKind kind, TimeSpan offset)
{
_date = new DateParts(year, month, day);
_time = new TimeParts(hour, minute, second, millisecond, kind, offset);
}