static public string XmlDocumentToString(ref XmlDocument doc)

{

MemoryStream stream = new MemoryStream();

XmlTextWriter writer = new XmlTextWriter(stream, null);

writer.Formatting = Formatting.Indented;

doc.Save(writer);

StreamReader sr = new StreamReader(stream, System.Text.Encoding.UTF8);

stream.Position = 0;

string xmlString = sr.ReadToEnd();

sr.Close();

stream.Close();

return xmlString;

}