private void TestDefaultPreferredComponentTypes()
{
int hr = 0;
IComponentTypes compTypes;
hr = tuningSpace.get_DefaultPreferredComponentTypes(out compTypes);
DsError.ThrowExceptionForHR(hr);
// Default ATSC Tuning Space has no Preferred Component Types so it return null
Debug.Assert((hr == 0) && (compTypes == null), "ITuningSpace.get_DefaultPreferredComponentTypes");
// Create a dummy ComponentTypes collection
compTypes = (IComponentTypes) new ComponentTypes();
hr = tuningSpace.put_DefaultPreferredComponentTypes(compTypes);
DsError.ThrowExceptionForHR(hr);
Debug.Assert(hr == 0, "ITuningSpace.put_DefaultPreferredComponentTypes");
Marshal.ReleaseComObject(compTypes);
}
