C#对XML的操作，利用DataSet对XML进行操作。

DataSet对XML进行生成、更新、添加、删除等操作
            //创建一个数据集
            DataSet dsTradeNews = new DataSet();
            //读取XML文件用于绑定到DataGrid上
            dsTradeNews.ReadXml(@"D:\CorpInfo.xml",XmlReadMode.Auto);

            //创建一个表
            DataTable dtTradeNews = new DataTable("TradeNews");
            //创建列
            DataColumn dcSimpleName = new DataColumn("SimpleName",Type.GetType("System.String"));
            DataColumn dcCode = new DataColumn("Code",Type.GetType("System.String"));
            //将列加入到表中
            dtTradeNews.Columns.Add(dcSimpleName);
            dtTradeNews.Columns.Add(dcCode);
            //创建行并为每列赋值
            DataRow drTradeNew = dtTradeNews.NewRow();
            drTradeNew["SimpleName"] = "公司";
            drTradeNew["Code"] =  "888888";
            //将表加入数据集中
            dsTradeNews.Tables.Add(dtTradeNews);
            //生成XML文件或覆盖XML文件
            try
            {
                dsTradeNews.WriteXml(@"D:\CorpInfo.xml");
            }
            catch(Exception ex)
            {
                Response.Write("生成XML文件产生异常：" + ex.Message);
                return ;
            }
            dgTradeNews.DataSource = dsTradeNews.Tables["TradeNews"].DefaultView;
            dgTradeNews.DataBind();

另一种操作方式：

利用：doc、XmlNode
        //创建XmlDocument的实例
        private XmlDocument doc = new XmlDocument();
        private XmlElement X_TR;
        private XmlElement X_Script;
        private XmlElement X_Connection;
        private XmlElement X_Time;
        private XmlElement X_Name;
        private XmlElement X_Path;

        private XmlText X_Script_Text;
        private XmlText X_Connection_Text;
        private XmlText X_Time_Text;
        private XmlText X_Name_Text;
        private XmlText X_Path_Text;

        const string cfileName = "XMLnote.xml";
        const string XmlFile = "ScriptMain";
        const string XmlTab = "TAB";
        const string XmlConnection = "Connection";
        const string XmlScript = "Script";
        const string XmlPath = "Path";
        const string XmlName = "Name";
        const string XmlTime = "Time";

        //XML文档起点
        private string XMLOP = "";            

doc.Load(cfileName);
            XmlNode Root = doc.DocumentElement;
            string XMLstart = GetXMLOP();
            XmlNode XNode = doc.SelectSingleNode(XMLstart);
            if(XNode != null)
            {    
                //产生行元素
                X_TR = doc.CreateElement("",XmlTab,"");
                //产生Script元素
                X_Connection = doc.CreateElement("",XmlConnection,"");
                X_Script = doc.CreateElement("",XmlScript,"");
                X_Path = doc.CreateElement("",XmlPath,"");
                X_Name = doc.CreateElement("",XmlName,"");
                X_Time = doc.CreateElement("",XmlTime,"");
                //产生该元素的文本
                X_Connection_Text = doc.CreateTextNode(XMLLogList.Connection);
                X_Script_Text = doc.CreateTextNode(XMLLogList.Script);
                X_Path_Text = doc.CreateTextNode(XMLLogList.Path);
                X_Name_Text = doc.CreateTextNode(XMLLogList.Name);
                X_Time_Text = doc.CreateTextNode(XMLLogList.Time.ToString());
                //向Script元素添加文本
                X_Connection.AppendChild(X_Connection_Text);
                X_Script.AppendChild(X_Script_Text);
                X_Path.AppendChild(X_Path_Text);
                X_Name.AppendChild(X_Name_Text);
                X_Time.AppendChild(X_Time_Text);
                //将Script元素添加到行节点下
                X_TR.AppendChild(X_Connection);
                X_TR.AppendChild(X_Script);
                X_TR.AppendChild(X_Path);
                X_TR.AppendChild(X_Name);
                X_TR.AppendChild(X_Time);
                //将行元素添加到父节点下
                XNode.AppendChild(X_TR);    
            }
            doc.Save(cfileName);

另一种操作XML的方式：

利用FileStream、XmlTextWriter操作XML文件
                //第一次生成XML记录文件
                FileStream XMLStream = new FileStream(cfileName,FileMode.CreateNew);
                XmlTextWriter XmlWrite = new XmlTextWriter(XMLStream,Encoding.Unicode);
                XmlWrite.Formatting = Formatting.Indented;
                try
                {
                    XMLBuilWriter(XmlWrite,XMLLogList);
                    XmlWrite.Close();
                }
                catch(Exception ex)
                {
                    cRemark = ex.Message.ToString();
                }


//开始创建XML文件
        static void XMLBuilWriter(XmlWriter Write,LogListAttribute XMLLogList)
        {
            Write.WriteStartElement(XmlFile);
            Write.WriteStartElement(XmlTab);
            Write.WriteElementString(XmlConnection,XMLLogList.Connection);
            Write.WriteElementString(XmlScript,XMLLogList.Script);
            Write.WriteElementString(XmlPath,XMLLogList.Path);
            Write.WriteElementString(XmlName,XMLLogList.Name);
            Write.WriteElementString(XmlTime,DateTime.Now.ToLongTimeString());
            Write.WriteEndElement();
            Write.WriteEndElement();
        }