public HRESULT Compare(IMFAttributes pTheirs, _MF_ATTRIBUTES_MATCH_TYPE MatchType, out bool pbResult)
{
var hr = _type.Compare(pTheirs, MatchType, out pbResult);
Trace("theirs: " + pTheirs.Trace() + " type: " + MatchType + " result: " + pbResult + " hr: " + hr);
return(hr);
}