private void button1_Click(object sender, System.EventArgs e)
		{
			String path = @"C:\temp\kunden.xml";
 
			/* Inhalt der kunden.xml: */
			/*
			<?xml version="1.0" standalone="yes"?>
			<kunden>
			<kunde>Klaus Meier</kunde>
			</kunden>			
			*/
 
			System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
			doc.Load(path);
			System.Xml.XmlNode root = doc.DocumentElement;
 		  System.Xml.XmlElement element = doc.CreateElement("kunde");
			element.InnerText = "Peter Lustig";
			root.AppendChild(element );
			doc.Save (path);
		}