XMLDocument.LoadXML(sting xml);方法可以将用str表述的xml语言转化为xml文档。 最后生成的XML的文档如下: <? xml version = " 1.0 " encoding = " utf-8 " ?> < keys > < numhuilu1 > 5 </ numhuilu1 > < numhuilu2 > 20 </ numhuilu2 > </ keys > 具体实现代码如下: /**/ /// <summary> ///检测XML_6243配置文件是否存在,不存在则重新建立 /// </summary> private void int_xml6243() ... { string path = Application.StartupPath + "/XML_6243.xml"; if (!File.Exists(path )) ...{ string str = "<?xml version='1.0' encoding="utf-8" ?>" + "<keys>" + "<numhuilu1>1</numhuilu1>" + "<numhuilu2>256</numhuilu2>" + "</keys>"; XmlDocument MyXMLDoc = new XmlDocument(); MyXMLDoc.LoadXml(str); MyXMLDoc.Save(path); } }