System.Globalization.PersianCalendar.GetDayOfWeek C# (CSharp) Method

        public override DayOfWeek GetDayOfWeek(DateTime time) {
            return ((DayOfWeek)((int)(time.Ticks / TicksPerDay + 1) % 7));
        }

        public static string GetPersianDayName(this DateTime date)
        {
            var pc = new System.Globalization.PersianCalendar();

            switch (pc.GetDayOfWeek(date))
            {
            case DayOfWeek.Saturday:
                return("شنبه");

            case DayOfWeek.Sunday:
                return("یکشنبه");

            case DayOfWeek.Monday:
                return("دوشنبه");

            case DayOfWeek.Tuesday:
                return("سه شنبه");

            case DayOfWeek.Wednesday:
                return("چهارشنبه");

            case DayOfWeek.Thursday:
                return("پنجشنبه");

            case DayOfWeek.Friday:
                return("جمعه");
            }

            return("");
        }