SampleTestClass.cs

class SampleTestClass : IDisposable
{
    bool disposed;

    public SampleTestClass()
    {
        WhereAmI();
    }

    public void Pass()
    {
        WhereAmI();
    }

    public void Fail()
    {
        WhereAmI();
        throw new FailureException();
    }

    public void Dispose()
    {
        if (disposed)
            throw new ShouldBeUnreachableException();
        disposed = true;

        WhereAmI();
    }
}