[TestFixture]
    public class InheritedFixture
    {
        protected int _setupValue;
        [SetUp]
        public void ShouldNotRun()
        {
            _setupValue = 10;
            throw new Exception("This code should not execute.");
        }

        [TearDown]
        public void ShouldNotRunAlso()
        {
            throw new Exception("This code should not execute.");
        }
    }

    [TestFixture]
    public class SubClass : InheritedFixture
    {
        [SetUp]
        public void ShouldRun()
        {

        }

        [TearDown]
        public void ShouldRunAlso()
        {

        }

        [Test]
        public void Should_pass()
        {
            Assert.AreNotEqual(10, _setupValue);
        }