How to prevent XDocument from adding XML version and encoding information C#

gistfile1.cs

 XmlDocument xdoc = new XmlDocument();
 TextWriter wwriter = new StreamWriter("c:/a.xml");
 //Do your logic to add all tags to xdoc
 
            ////with Tag <?xml version="1.0" encoding="utf-8"?>
            //xdoc.Save(wwriter);

            ////without tag- <?xml version="1.0" encoding="utf-8"?>         
            XmlWriterSettings xws = new XmlWriterSettings { OmitXmlDeclaration = true };
            using (XmlWriter xw = XmlWriter.Create(wwriter, xws))
                xdoc.Save(xw);