System.Globalization.ThaiBuddhistCalendar.ToFourDigitYear C# (CSharp) Method

        public override int ToFourDigitYear(int year) {
            return (helper.ToFourDigitYear(year, this.TwoDigitYearMax));
        }
    }

 public void PosTest2()
 {
     System.Globalization.Calendar tbc = new ThaiBuddhistCalendar();
     Random rand = new Random(-55);
     int year = rand.Next(tbc.GetYear(tbc.MinSupportedDateTime), tbc.GetYear(tbc.MaxSupportedDateTime));
     Assert.Equal(year, tbc.ToFourDigitYear(year));
 }