1 xmlDocument = new XmlDocument();2 xmlDocument.Load(xmlPath);3 nsmgr = new XmlNamespaceManager(xmlDocument.NameTable);4 XmlNode xmlNode = xmlDocument.SelectSingleNode(@"/AppItems/AppItem[@key=‘" + nodeName + "‘]", nsmgr);5 XmlElement Xe = (XmlElement)xmlNode;6 Xe.SetAttribute("value", nodeText);7 xmlDocument.Save(xmlPath);