public int GetWeekInMonth(int year, int month)

        {

            CultureInfo cinfo = CultureInfo.CurrentCulture;

            Calendar MyCal = CultureInfo.InvariantCulture.Calendar;

            int CountWeek = 0;

            for (int icount = 1; icount < cinfo.Calendar.GetDaysInMonth(year, month); icount++)

            {

                string str = Convert.ToString(MyCal.GetDayOfWeek(new DateTime(year, month, icount)));

                if (str.Equals(“Monday”, StringComparison.OrdinalIgnoreCase))

                {

                    CountWeek = CountWeek + 1;

                }

            }

            return CountWeek;

        }

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