XmlDocument <-> XDocument conversion

xmldocument-xdocument-conversion.cs

 private XDocument ConvertXmlDocumentToXDocument(XmlDocument xmlDoc)
 {
      return XDocument.Load(xmlDoc.CreateNavigator().ReadSubtree());
 }

 private XmlDocument ConvertXDocumentToXmlDocument(XDocument xDoc)
 {
       var xmldoc = new XmlDocument();
       xmldoc.Load(xDoc.CreateReader());
       return xmldoc;            
 }