Create XML document programatically in C#

XmlDocument XD = new XmlDocument();

            XmlNode declaration = XD.CreateNode(XmlNodeType.XmlDeclaration, null, null);

            XD.AppendChild(declaration);

            XmlNode student = XD.AppendChild(XD.CreateElement("student"));

            XmlNode name = student.AppendChild(XD.CreateElement("name"));

            name.InnerText = "prasad";

            XmlNode dept = student.AppendChild(XD.CreateElement("dept"));

            dept.InnerText = "information tech";

            XmlNode id = student.AppendChild(XD.CreateElement("id"));

            id.InnerText = "1324";         

            XD.Save("student.xml");

              (OR)

            string data = XD.OuterXml;

OutPut: 

<?xml version="1.0"?>

<student>

 <name>prasad</name>

 <dept>information tech</dept>

 <id>1324</id>

</student>