private void TestFindID()
        {
            int          hr = 0;
            int          id;
            ITuningSpace ts;

            hr = tsContainer.get_Item(3, out ts);
            DsError.ThrowExceptionForHR(hr);

            hr = tsContainer.FindID(ts, out id);
            DsError.ThrowExceptionForHR(hr);

            Debug.Assert(id == 3, "ITuningSpaceContainer.FindID");
        }