C# 生成 XML

XmlDocument doc = new XmlDocument();
XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
doc.AppendChild(dec);

XmlElement root = doc.CreateElement("BookInfo");
doc.AppendChild(root);

XmlElement isbn = doc.CreateElement("ISBN");
isbn.InnerText = "6926456900364";
root.AppendChild(isbn);

XmlElement bookTitle = doc.CreateElement("BookTitle");
XmlCDataSection cd = doc.CreateCDataSection("杜拉拉3");
bookTitle.AppendChild(cd);

XmlAttribute suttitle = doc.CreateAttribute("Subtitle");
suttitle.Value = "我在这战斗的一年里";
bookTitle.Attributes.Append(suttitle);

root.AppendChild(bookTitle);
string xmlString = doc.OuterXml;
doc.Save(@"c:\aa.xml");

结果如下

<?xml version="1.0" encoding="UTF-8" ?> 
<BookInfo>
   <ISBN>6926456900364</ISBN> 
   <BookTitle Subtitle="我在这战斗的一年里"><![CDATA[杜拉拉3]]></BookTitle>
</BookInfo>