Leap year check kata in C# using NUnit

LeapYearChecker.cs

using NUnit.Framework;

namespace LeapYear
{
    public class LeapYearChecker
    {
        public bool IsLeapYear(int year)
        {
            if (year % 400 == 0) return true;
            if (year % 100 == 0) return false;
            if (year % 4 == 0) return true;
            return false;

            // or simply
            //return DateTime.IsLeapYear(year);
        }
    }

    [TestFixture]
    public class LeapYearCheckerTest
    {
        private LeapYearChecker leapYearChecker;

        [TestFixtureSetUp]
        public void BeforeEachTest()
        {
            leapYearChecker = new LeapYearChecker();
        }

        [TestCase(2000, Result = true)]
        [TestCase(4, Result = true)]
        [TestCase(1, Result = false)]
        [TestCase(64, Result = true)]
        [TestCase(1900, Result = false)]
        [TestCase(100, Result = false)]
        public bool IsGivenYearALeapYear(int year)
        {
            return leapYearChecker.IsLeapYear(year);
        }
    }
}

See my blog post which goes with this: http://comp-phil.blogspot.com/2014/06/leap-year-in-key-of-c-f-haskell-and.html