C#向xml文件插入节点

 public void GetMusicFlashList(int id)
        {
            MgCms.BLL.Mg_MusicInfoBLL MusicInfoBLL = new MgCms.BLL.Mg_MusicInfoBLL();
            StringBuilder strHtml = new StringBuilder();
            DataSet ds = MusicInfoBLL.GetList(string.Format(" BagID = '{0}' and Status='1' order by Sort desc ", id));
            if (ds.Tables[0].Rows.Count > 0)
            {
                strHtml.AppendLine("<?xml version=\"1.0\" encoding=\"gb2312\"?>");
                strHtml.AppendLine("<list>");
                for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                {
                    strHtml.AppendLine("<music> ");
                    strHtml.AppendFormat("<name>{0}</name> ", ds.Tables[0].Rows[i]["MusicTitle"]);
                    strHtml.AppendFormat("<url>{0}</url>", ds.Tables[0].Rows[i]["MusicUrl"]);
                    strHtml.AppendFormat("</music>");
                }
                strHtml.AppendLine("</list>");
                string filename = Server.MapPath("/xml/list.xml");
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(filename);
                xmlDoc.RemoveAll();
                xmlDoc.InnerXml = strHtml.ToString();
                xmlDoc.Save(filename);
            }
        }