System.Xml.Xsl.XslTransform supports the XSLT 1.0 syntax. The XSLT style sheet must include the namespace declaration xmlns:xsl= http://www.w3.org/1999/XSL/Transform.

This method loads the XSLT style sheet, including any style sheets referenced in xsl:include and xsl:import elements. The style sheet loads from the current node of the System.Xml.XmlReader through all its children. This enables you to use a portion of a document as the style sheet.

After the XslTransform.Load(System.Xml.XmlReader, System.Xml.XmlResolver, System.Security.Policy.Evidence) method returns, the System.Xml.XmlReader is positioned on the next node after the end of the style sheet. If the end of the document is reached, the System.Xml.XmlReader is positioned at the end of file (EOF).

If the style sheet contains entities, you should specify an System.Xml.XmlReader that can resolve entities (System.Xml.XmlReader.CanResolveEntity returns true). In this case, an System.Xml.XmlValidatingReader can be used.

For issues with the erload:System.Xml.Xsl.XslTransform.Load method and style sheets with embedded scripts, see article Q316755 in the Microsoft Knowledge Base at http://support.microsoft.com.

There are different ways to provide evidence. The following table describes what type of evidence to provide for common user scenarios.

XsltTransform xslt = new XslTransform();
xslt.Load(xslReader, resolver, this.GetType().Assembly.Evidence);

XsltTransform xslt = new XslTransform();
Evidence evidence = XmlSecureResolver.CreateEvidenceForUrl(stylesheetURL);
xslt.Load(xslReader,resolver,evidence);