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<?xml version="1.0" standalone="yes"?>
<books>
  <book>
    <author>Carson</author>
    <price format="dollar">31.95</price>
    <pubdate>05.01.2001</pubdate>
  </book>
  <pubinfo>
    <publisher>MSPress</publisher>
    <state>WA</state>
  </pubinfo>
</books>					

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using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.IO;

namespace XML_Test
{
    class Xml_Test
    {
        static void Main(string[] args)
        {
            FileStream fs = new FileStream("C:\\testXML.xml", FileMode.Create);
            XmlTextReader xr = new XmlTextReader(fs);
            
            XmlDocument xd = new XmlDocument();

            xd.AppendChild(xd.CreateXmlDeclaration("1.0", String.Empty, "yes"));
            xd.AppendChild(xd.CreateElement("books"));
            XmlNode root = xd.DocumentElement;

            XmlNode x = root.AppendChild(xd.CreateElement("book"));
            XmlElement y = (XmlElement) x.AppendChild(xd.CreateElement("author"));
            y.InnerText = "Carson";
            y = (XmlElement) x.AppendChild(xd.CreateElement("price"));
            y.InnerText="31.95";
            y.SetAttribute("format", "dollar");
            y = (XmlElement)x.AppendChild(xd.CreateElement("pubdate"));
            y.InnerText = "05.01.2001";
            x = root.AppendChild(xd.CreateElement("pubinfo"));
            y = (XmlElement)x.AppendChild(xd.CreateElement("publisher"));
            y.InnerText = "MSPress";
            y = (XmlElement)x.AppendChild(xd.CreateElement("state"));
            y.InnerText = "WA";

            xd.Save(fs);                 //Datei speichern
            xd.Save(Console.Out);  //XML auf Console ausgeben
            fs.Close();

      }
    }
}