private void TestPreferredComponentTypes()
{
int hr = 0;
IComponentTypes compTypes;
hr = tuner.get_PreferredComponentTypes(out compTypes);
DsError.ThrowExceptionForHR(hr);
hr = tuner.put_PreferredComponentTypes(compTypes);
DsError.ThrowExceptionForHR(hr);
Debug.Assert(hr == 0, "ITuner.get_PreferredComponentTypes / put_PreferredComponentTypes");
Marshal.ReleaseComObject(compTypes);
}