For the given mock object below, how can I check if the WashCar(ICar car) method is setting the TiresWashed property?

```
public interface ICar 
{
    string Model {get;set;}
    bool TiresWashed {get; set;}
    bool WindowsWashed {get; set; }
}

    [TestMethod]
    public vouid MyUnitTest()
    {
    ICar mockCar = MockRepository.GenerateMock<ICar>();
    CarServiceUtility.WashCar(mockCar);

    //Assert if PrepareCar method is called: (this is why I had mock)
    mockCar.AssertWasCalled(c=>c.PrepareCar());

    //TODO 
    // Assert if mockCar.TiresWashed is set with any value
    }

```