xml是一种标签语言，常用于存储处理数据。在Csharp中创建xml文档的方式如下：
首先引入命名空间

using System.Xml;

 

然后创建文档并给文档添加基本信息和节点信息：

XmlDocument doc = new XmlDocument();
XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "utf-8", null);
doc.AppendChild(dec);
XmlElement books = doc.CreateElement("Books");
doc.AppendChild(books);
XmlElement book1 = doc.CreateElement("Book");
books.AppendChild(book1);
XmlElement bookName1 = doc.CreateElement("BookName");
bookName1.InnerText = "水浒传";
book1.AppendChild(bookName1);

XmlElement author1 = doc.CreateElement("Author");
author1.InnerXml = "<authorName>吴承恩</authorName>";
book1.AppendChild(author1);

XmlElement price1 = doc.CreateElement("Price");
price1.InnerXml = "100￥";
book1.AppendChild(price1);

XmlElement des1 = doc.CreateElement("Des");
des1.InnerXml = "好看，顶！~！！！！";
book1.AppendChild(des1);

Console.WriteLine("保存成功");
doc.Save("Book.xml");
Console.ReadKey();