System.Globalization.TaiwanCalendar.GetDayOfMonth C# (CSharp) Method

        public override int GetDayOfMonth(DateTime time) {
            return (helper.GetDayOfMonth(time));
        }

 public void PosTest2()
 {
     System.Globalization.Calendar tc = new TaiwanCalendar();
     Random rand = new Random(-55);
     int year = 2000;
     int month = 2;
     int day;
     DateTime dt;
     for (day = 1; day < 30; day++)
     {
         dt = new DateTime(year, month, day);
         Assert.Equal(tc.GetDayOfMonth(dt), day);
     }
 }