gistfile1.txt

        [Test]
        public void EnsureDependencyIsCalledWithCorrectArguments()
        {
            var dependency = MockRepository.GenerateMock<IDependency>();
            dependency.Expect(x => x.DoSomething(null, 0))
                      .IgnoreArguments().Return(7).Repeat.Once();
            dependency.Expect(x => x.DoSomething(null, 0))
                      .IgnoreArguments().Return(3).Repeat.Once();

            var systemUnderTest = new SystemUnderTest(dependency);
            var returned = systemUnderTest.MethodUnderTest("MyData", 1234);

            Assert.AreEqual(10, returned);
            dependency.AssertWasCalled(d => 
                d.DoSomething(Arg<SomeComplexType>.Matches(t => t.stringData == "Sending MyData"), 
                              Arg.Is(1111))
            );
            dependency.AssertWasCalled(d => 
                d.DoSomething(Arg<SomeComplexType>.Matches(t => t.stringData == "Sending 1234"), 
                              Arg.Is(2222))
            );
        }

Thank you for this. :)