رفع خطای 31 بانک ملت

public string LocalTime
{
    get
    {
        return DateTime.Now.Hour.ToString().PadLeft(2, '0') + DateTime.Now.Minute.ToString().PadLeft(2, '0') +
       DateTime.Now.Second.ToString().PadLeft(2, '0');
    }
}

public string LocalDate
{
    get
    {
        return DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString().PadLeft(2, '0') +
       DateTime.Now.Day.ToString().PadLeft(2, '0');
    }
}