推荐订阅源

using System.Xml;

 //------------------------------

string xmlFile = Server.MapPath(@"files.xml");
 XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlFile);
string xmlStr = xmlDoc.OuterXml;

TextBox1.Text = xmlStr; 

//--------------------------

1. Serialize and deserialize objects as Xml using generic types in C# 2.0

 http://geekswithblogs.net/paulwhitblog/archive/2007/07/20/114076.aspx

2.XML Serialization with C#

 http://www.willasrari.com/blog/xml-serialization-with-c/000231.aspx

3.Serializing .NET Objects Into XML – How to Retrieve XML Schema From an Interface

 http://blog.bodurov.com/XML-Schema-From-dot-NET-Interface