System.Globalization.CultureTableRecord.ConvertFirstDayOfWeekMonToSun C# (CSharp) Method

        private unsafe ushort ConvertFirstDayOfWeekMonToSun(int iTemp)
        {
            // Convert Mon-Sun to Sun-Sat format
            if (iTemp < 0 || iTemp > 6) {
                // If invalid data exist in registry, assume
                // the first day of week is Monday.
                iTemp = 1;
            } else {
                if (iTemp == 6) {
                    iTemp = 0;
                } else {
                    iTemp++;
                }
            }
            return unchecked((ushort)iTemp);
        }