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

        public override bool IsLeapDay(int year, int month, int day, int era)
        {
            return (helper.IsLeapDay(year, month, day, era));
        }

        public void NegTest2()
        {
            System.Globalization.Calendar tc = new TaiwanCalendar();
            Random rand = new Random(-55);
            int year = tc.MinSupportedDateTime.Year - rand.Next(1, Int32.MaxValue);
            int month = rand.Next(1, 13);
            int day = rand.Next(1, 28);
            int era = Calendar.CurrentEra;

            Assert.Throws<ArgumentOutOfRangeException>(() =>
            {
                tc.IsLeapDay(year, month, day, era);
            });
        }