private void TestEnumTuningSpaces()
{
int hr = 0;
IEnumTuningSpaces tuningSpaces;
hr = tuner.EnumTuningSpaces(out tuningSpaces);
DsError.ThrowExceptionForHR(hr);
Debug.Assert((hr == 0) && (tuningSpaces != null), "ITuner.EnumTuningSpaces");
Marshal.ReleaseComObject(tuningSpaces);
}