Mocking a base method

Hi,

Thanks for any help you can give me, I'm probably missing something simple here, but I'm trying to do the following:

    public class BaseClass
    {
        public int SomeMethod()
        {
            return 1;
        }
    }

    public class DerivedClass : BaseClass
    {
        public int SomeMethodNew()
        {
            return base.SomeMethod() + 1;
        }
    }

        [TestMethod]
        public void Test()
        {
            Mock<DerivedClass> mock = MockManager.Mock<DerivedClass>();
            // mock only BaseClass.SomeMethod when called from a DerivedClass Type.
            mock.CallBase.ExpectAndReturn("SomeMethod", 100);
            DerivedClass d = new DerivedClass();
            int result = d.SomeMethodNew();
            Assert.AreEqual(101, result);
        }

I've modified the sample for the CallBase documentation to call a different method name rather than an overriden method.

This doesn't work though, so how do i mock out the call to the base class? I've tried mocking the base class directly but this doesn't seem to work either.

        [TestMethod]
        public void Test()
        {
            Mock<BaseClass> mock = MockManager.Mock<BaseClass>();
            mock.ExpectAndReturn("SomeMethod", 100);
            DerivedClass d = new DerivedClass();
            int result = d.SomeMethodNew();
            Assert.AreEqual(101, result);
        }

Any Ideas??
Cheers,
Rob
________
Super Cub