用C#创建XML

           XmlDocument doc = new XmlDocument();
            XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "GB2312", null);
            doc.AppendChild(dec);
            //创建一个根节点（一级）
            XmlElement root = doc.CreateElement("First");
            doc.AppendChild(root);
            //创建节点（二级）
            XmlNode node = doc.CreateElement("Seconde");
            //创建节点（三级）
            XmlElement element1 = doc.CreateElement("Third1");
            element1.SetAttribute("Name", "Sam");
            element1.SetAttribute("ID", "665");
            element1.InnerText = "Sam Comment";
            node.AppendChild(element1);

            XmlElement element2 = doc.CreateElement("Third2");
            element2.SetAttribute("Name", "Round");
            element2.SetAttribute("ID", "678");
            element2.InnerText = "Round Comment";
            node.AppendChild(element2);

           

            root.AppendChild(node);
            doc.Save(@"d:\bb.xml");
            Console.Write(doc.OuterXml);