System.Globalization.UmAlQuraCalendar.GetDaysInMonth C# (CSharp) Метод

        public override int GetDaysInMonth(int year, int month, int era) {
            CheckYearMonthRange(year, month, era);

            if ((HijriYearInfo[year-MinCalendarYear].HijriMonthsLengthFlags & (1<<month-1))==0)
                return 29;
            else
                return 30;
        }

        private void WriteDates()
        {
            //the day value is used to write the dates on the calendar, the init value is used to tell us where
            //to start in the calendar
            int day  = 1;
            int init = GetDayNumber(1);

            for (int i = init; i <= 6; i++)
            {
                //writes out the dates in the first row starting from the correct position
                tableLayoutPanel1.GetControlFromPosition(i, 1).Text = day.ToString(System.Threading.Thread.CurrentThread.CurrentUICulture);
                day += 1;
            }
            int daysInMonth;

            try
            {
                daysInMonth = UmAlQuraInstance.GetDaysInMonth(m_selectedYear, m_selectedMonth);
            }
            catch (ArgumentException exception)
            {
                MessageBox.Show(exception.Message);
                return;
            }
            for (int i = 2; i <= 5; i++)
            {
                for (int j = 0; j <= 6; j++)
                {
                    //writes out the remaining dates in the calendar watching out for the number of day in the month*/
                    if (day <= daysInMonth)
                    {
                        tableLayoutPanel1.GetControlFromPosition(j, i).Text = day.ToString(System.Threading.Thread.CurrentThread.CurrentUICulture);
                        day++;
                    }
                }
            }
            // There is an extra day we need to write
            init = 0;
            string previousDay;

            while (daysInMonth >= day)
            {
                previousDay = tableLayoutPanel1.GetControlFromPosition(init, 5).Text;
                tableLayoutPanel1.GetControlFromPosition(init, 5).Text = previousDay + "/" + day.ToString(System.Threading.Thread.CurrentThread.CurrentUICulture);
                day++;
                init++;
            }
        }