public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
int?GuardainID = (int?)value;
if (GuardainID == null)
{
return("لم يتم الاختيار بعد");
}
Guardian g = Guardian.GetGuardianByID((int)GuardainID);
return(g.FirstName + " " + g.LastName);
}