The Extensible Stylesheet Language Transformation (XSLT) lets you transform the content of a source XML document into another document that is different in format or structure. For example, you can use XSLT to transform XML into HTML for use on a Web site or to transform it into a document that contains only the fields required by an application. This transformation process is specified by the W3C XSL Transformations (XSLT) Version 1.0 recommendation.
The XslTransform class is obsolete in .NET Framework version 2.0. The XslCompiledTransform class is a new implementation of the XSLT engine. It includes performance improvements and new security features. The recommended practice is to create XSLT applications using the XslCompiledTransform class.