XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.AppendChild(xmlDoc.CreateXmlDeclaration("1.0", "utf-8", null));
        xmlDoc.AppendChild(xmlDoc.CreateElement("Note"));
        XmlElement day = xmlDoc.CreateElement("Day");
        day.SetAttribute("year", "2009");
        day.SetAttribute("month", "12");
        day.SetAttribute("day", "8");
        xmlDoc.DocumentElement.AppendChild(day);
        day.AppendChild(xmlDoc.CreateElement("To"));
        day["To"].InnerText = "黄建国";
        day.AppendChild(xmlDoc.CreateElement("From"));
        day["From"].InnerText = "李忠";
        day.AppendChild(xmlDoc.CreateElement("Heading"));
        day["Heading"].InnerText = "提醒";
        day.AppendChild(xmlDoc.CreateElement("Message"));
        day["Message"].InnerText = "不要忘了这个周末和我的约会";
        xmlDoc.Save(@"c:\test.xml"));