Introduction to the XML Web Server Control
You can use the XML Web server control to write an XML document, or the results of an XSL Transformations (XSLT), into a Web page. The XML output appears in the Web page at the location of the control. For more information on XML and XSLT, see XML (Extensible Markup Language) in the Microsoft XML SDK documentation.
The XML and the XSLT information can be in external documents, or you can include the XML inline. There are two ways to reference external documents using property settings in the XML Web server control. You can provide a path to the XML document in the control tag, or you can load the XML and XSLT documents as objects and then pass them to the control. If you prefer to include the XML inline, write it between the opening and closing tags of the control.
Adding XML Web Server Controls to a Web Forms Page | Loading XML Data in the XML Web Server Control | Transforming XML Data in the XML Web Server Control | Walkthrough: Displaying an XML Document in a Web Forms Page using Transformations | XML in Visual Studio