private void TestClone()
        {
            int          hr = 0;
            ITuningSpace newTS;
            string       uName1, uName2;

            hr = tuningSpace.Clone(out newTS);
            DsError.ThrowExceptionForHR(hr);

            Debug.Assert((hr == 0) && (newTS != null), "ITuningSpace.Clone");

            hr = tuningSpace.get_UniqueName(out uName1);
            DsError.ThrowExceptionForHR(hr);

            hr = newTS.get_UniqueName(out uName2);
            DsError.ThrowExceptionForHR(hr);

            Debug.Assert(uName1 == uName2, "ITuningSpace.Clone");

            Marshal.ReleaseComObject(newTS);
        }