public static string GregToHijri(DateTime dtTime)
{
if (dtTime == DateTime.MinValue)
return "";
UmAlQuraCalendar calHijri = new UmAlQuraCalendar();
string weekday = Convert.ToString(calHijri.GetDayOfWeek(dtTime));
int CurrDayOfMonth = calHijri.GetDayOfMonth(dtTime);
int CurrMonth = calHijri.GetMonth(dtTime);
int Curryear = calHijri.GetYear(dtTime);
return CurrDayOfMonth.ToString() + "/" + CurrMonth.ToString() + "/" + Curryear.ToString();
}