http://blogs.msdn.com/antosha/archive/2006/07/16/xslcompiledtransform-slower-than-xsltransform.aspxThe .NET Framework 2.0 provides a new System.Xml.Xsl.XslCompiledTransform XSLT processor class, which is intended to replace the obsoleted XslTransform class. One of the major differences between the two is that while the latter is an XSLT interpreteren-USCommunityServer 2.1 SP1 (Build: 61025.2)