public GDMDatePeriod()
 {
     fDateFrom = new GDMDate();
     fDateTo   = new GDMDate();
 }
        public static UDN GetUDNByFormattedStr(string dateStr, bool aException = false)
        {
            GDMDate dtx = GDMDate.CreateByFormattedStr(dateStr, aException);

            return((dtx != null) ? dtx.GetUDN() : UDN.CreateEmpty());
        }
 public GDMDateRange()
 {
     fDateAfter  = new GDMDate();
     fDateBefore = new GDMDate();
 }