static void Main(string[] args)  {   //使用XmlDocument創(chuàng)建xml   XmlDocument xmldoc = new XmlDocument();   XmlDeclaration xmldec = xmldoc.CreateXmlDeclaration("1.0", "utf-8", "yes");   xmldoc.AppendChild(xmldec);   //添加根節(jié)點(diǎn)   XmlElement rootElement = xmldoc.CreateElement("school");   xmldoc.AppendChild(rootElement);   //添加根節(jié)點(diǎn)下的子節(jié)點(diǎn)元素   XmlElement classElement = xmldoc.CreateElement("class");   rootElement.AppendChild(classElement);   XmlAttribute atrrClass = xmldoc.CreateAttribute("No");   atrrClass.Value = "1";   classElement.Attributes.Append(atrrClass);   //添加子節(jié)點(diǎn)下的元素   XmlElement stuElement = xmldoc.CreateElement("student");   classElement.AppendChild(stuElement);   XmlAttribute attrStu = xmldoc.CreateAttribute("sid");   attrStu.Value = "20180101";   stuElement.Attributes.Append(attrStu);   //保存文件   xmldoc.Save(@"d:/zzz/TestA.xml");   Console.WriteLine("創(chuàng)建xml文件ok！");   Console.ReadKey();  }

static void Main(string[] args)  {   //使用XDocument創(chuàng)建xml   System.Xml.Linq.XDocument xdoc = new XDocument();   XDeclaration xdec = new XDeclaration("1.0", "utf-8", "yes");   xdoc.Declaration = xdec;   //添加根節(jié)點(diǎn)   XElement rootEle = new XElement("school");   xdoc.Add(rootEle);   //給根節(jié)點(diǎn)添加子節(jié)點(diǎn)   XElement classEle = new XElement("class");   XAttribute attrClass = new XAttribute("No", 1);   classEle.Add(attrClass);   rootEle.Add(classEle);   //添加子節(jié)點(diǎn)下的元素   XElement stuEle = new XElement("student");   XAttribute atrStu = new XAttribute("sid", "20180101");   stuEle.Add(atrStu);   classEle.Add(stuEle);   //保存文件   xdoc.Save("d://zzz//TestB.xml");   Console.WriteLine("創(chuàng)建xml文件ok");   Console.ReadKey();  }