The Microsoft .NET XSLT engine, like many other XSLT engines, allows custom functions inside of an XSLT stylesheet document. By providing an "extension object" to an XsltArgumentList instance, an XSLT stylesheet can "call out" to methods in the CLR. See the XsltArgumentList description for an example. public interface IXsltContextFunction { // Public Instance Properties public XPathResultType[ ] ArgTypes {get; } public int Maxargs {get; } public int Minargs {get; } public XPathResultType ReturnType {get; } // Public Instance Methods public object Invoke (XsltContext xsltContext , object[ ] args , System.Xml.XPath.XPathNavigator docContext ); } Returned ByXsltContext.ResolveFunction( ) |