private static string getNodes(string xpath, string result){
var sw = new StringWriter();
var sets = new XmlWriterSettings{OmitXmlDeclaration = true};
var xw = XmlWriter.Create(sw, sets);
xw.WriteStartElement("__");
var iter = new XPathDocument(new StringReader(result)).CreateNavigator().Select(xpath);
while (iter.MoveNext()){
if (iter.Current.NodeType == XPathNodeType.Attribute)
{
xw.WriteElementString("_"+iter.Current.Name,iter.Current.Value);
}
else{
iter.Current.WriteSubtree(xw);
}
}
xw.WriteEndElement();
xw.Flush();
result = sw.ToString();
return result;
}