private static void RemoveUnnecessaryExtAttr(OpenXmlElement node, OpenXmlElement newnode) { // Reconstruct the _nsMappings for the new node based on the original node node.MakeSureParsed(); if (newnode.NamespaceDeclField != null && node.NamespaceDeclField != null) { newnode.NamespaceDeclField = new List <KeyValuePair <string, string> >(node.NamespaceDeclField); } }