private XmlNameTable GetNameTable (NSResolver nss1, NSResolver nss2) { XmlNameTable nt = null; if (nss1 is XmlNamespaceManager) nt = ((XmlNamespaceManager) nss1).NameTable; if (nss2 is XmlNamespaceManager) nt = ((XmlNamespaceManager) nss2).NameTable; if (nt == null) nt = new NameTable (); return nt; }