internal void ParseDocumentType(XmlDocumentType dtNode)
{
XmlDocument doc = dtNode.OwnerDocument;
//if xmlresolver is set on doc, use that one, otherwise use the default one being created by xmlvalidatingreader
if (doc.HasSetResolver)
ParseDocumentType(dtNode, true, doc.GetResolver());
else
ParseDocumentType(dtNode, false, null);
}