System.Globalization.GregorianCalendar.GetEra C# (CSharp) Метод

        public override int GetEra(DateTime time)
        {
            return (ADEra);
        }

 public void PosTest3()
 {
     System.Globalization.Calendar kC = new KoreanCalendar();
     System.Globalization.Calendar gC = new GregorianCalendar();
     DateTime dateTime = gC.ToDateTime(2004, 2, 29, 0, 0, 0, 0);
     int expectedValue = gC.GetMonthsInYear(dateTime.Year, gC.GetEra(dateTime));
     int actualValue;
     actualValue = kC.GetMonthsInYear(dateTime.Year + 2333, kC.GetEra(dateTime));
     Assert.Equal(expectedValue, actualValue);
 }