XElement firstParticipant; // A full document with all the bells and whistles. XDocument xDocument = new XDocument( new XDeclaration("1.0", "UTF-8", "yes"), new XDocumentType("BookParticipants", null, "BookParticipants.dtd", null), new XProcessingInstruction("BookCataloger", "out-of-print"), // Notice on the next line that we are saving off a reference to the first // BookParticipant element. new XElement("BookParticipants", firstParticipant = new XElement("BookParticipant", new XComment("This is a new author."), new XProcessingInstruction("AuthorHandler", "new"), new XAttribute("type", "Author"), new XElement("FirstName", "Joe"), new XElement("LastName", "Rattz")), new XElement("BookParticipant", new XAttribute("type", "Editor"), new XElement("FirstName", "Ewan"), new XElement("LastName", "Buckingham")))); Console.WriteLine(firstParticipant.Element("FirstName")); 输出 <FirstName>Joe</FirstName> firstParticipant.Element("FirstName") 这里没写循环,所以只打印出第一个元素