菜鸟问题，如何将现有的数据生成一个XML文件？在线等！

Question

//保存数据到xml文件
private void writeXml()
{
  string fileName = Application.StartupPath+"\\SysSetting.xml";
  XmlTextWriter tw = new XmlTextWriter(fileName,null);
//idented属性让子节点自动从父节点缩进
  tw.Formatting = Formatting.Indented;
  tw.WriteStartDocument();  tw.WriteStartElement("Application");
            
  tw.WriteElementString("DataConnection",this.connStr);
  tw.WriteElementString("UnReceivePath",this.extbUnReceivedPath.Text);
  tw.WriteElementString("ReceivedPath",this.extbRecivedPath.Text);
  tw.WriteElementString("ErrorPath",this.extbErrorPath.Text);
  tw.WriteElementString("NewPath",this.extbNewPath.Text);
  tw.WriteElementString("LogFile",this.extbLogFile.Text);  tw.WriteEndElement();  tw.WriteEndDocument();  tw.Flush();
  tw.Close();  this.Close();
}