C# XmlDocument &XDocument Interconversion

using System.Xml.Linq;

XmlDocument  to  XDocument 

XmlDocument Xmldoc = new XmlDocument();

XDocument XDoc = XDocument.Parse(Xmldoc.OuterXml);

XDocument to XmlDocument

XDocument Xdoc = new XDocument();

XmlDocument Xmldoc = new XmlDocument();

Xmldoc.LoadXml(Xdoc.Document.ToString());

資料來源:http://www.dotblogs.com.tw/nel/archive/2010/08/20/17327.aspx