NonPublic WithGenericArguments call

    public class ItemController:Controller
    {
        public IItemFactory factory;
        public RedditCloneTests.TypeMockTesting.IItemFactory Factory
        {
            get { return factory; }
            set { factory = value; }
        }
        public ItemController()
            : this(null)
        {

        }
        public ItemController(IItemFactory itemFactory)
        {
            factory = itemFactory ?? new ItemFactory();
        }

        public ActionResult Login()
        {
            return View("Hi", 1);
        }
    }

    [TestFixture, ClearMocks]
    public class TestItemFactory
    {
        private ItemController controllerFake;
        private ItemController controller;
        private ItemFactory itemFactoryFake;
        public TestItemFactory()
        {

        }


        [SetUp]
        public void Init()
        {

            controllerFake = Isolate.Fake.Instance<ItemController>(Members.CallOriginal);
            Isolate.SwapNextInstance<ItemController>().With(controllerFake);

            controller = new ItemController();
        }

        [Test, Isolated]
        public void TestLogin()
        {
            Isolate.NonPublic.WhenCalled(controllerFake, "View").WithGenericArguments(typeof(string), typeof(object)).WillReturn(null);
            controllerFake.Login();
        }


    }

Method View<String> in type RedditCloneTests.TypeMockTesting.ItemController has no matching overload that returns TypeMock.Mock+a.
   TypeMock.TypeMockException
   Message: 
   *** Method View<String> in type RedditCloneTests.TypeMockTesting.ItemController has no matching overload that returns TypeMock.Mock+a.
   Source: TypeMock
   StackTrace:
   at bt.b(Type A_0, String A_1, Type A_2, Type[] A_3)
   at TypeMock.Mock.a(String A_0, Object A_1, Boolean A_2, Boolean A_3, Int32 A_4, Type[] A_5)
   at TypeMock.Mock.a(String A_0, Object A_1, Boolean A_2, Boolean A_3, Type[] A_4)
   at TypeMock.Mock.AlwaysReturn(String method, Object ret, Type[] genericTypes)
   at x.WillReturn(Object value)

Isolate.NonPublic.WhenCalled(controllerFake, "View").WithGenericArguments(typeof(string), typeof(object)).WillReturn(null);