Code Access Security - System.Security.SecurityException: Request failed.

I have written a Web User Control that runs inside of Sharepoint, but when I 
want to use a custom convertor class to convert an XML attribute I get the 
following error:

System.Security.SecurityException: Request failed.

Basically I start with a DataSet that I then want to transform into HTML via 
an XSL stylesheet.

I do not appear to be able to use the XsltArgumentList Extension Object.

>From what I have found this object requires FULL TRUST.

If I comment out the args.AddExtensionObject("urn:trimble-date",

Convertor); the code works fine.

This code basically installs an extension object which in my case converts 
date/times to a format that I want to use in my XSL

To make this worse this needs to run as part of a sharepoint application.

I have tried adjusting the security on the DLL that this code is part of and 
it does not help.

Does anyone have any thoughts?



       XmlDataDocument datadoc = new XmlDataDocument(ds);

       XslTransform myXslTrans = new XslTransform() ;


       // Add an object to convert DateTime format.

       HelpdeskDateConvertor Convertor = new HelpdeskDateConvertor();

       XsltArgumentList args =  new XsltArgumentList();

       args.AddExtensionObject("urn:trimble-date", Convertor);

       myXslTrans.Transform(datadoc,null, stWrite,null);


catch(Exception ex)





11/21/2005 1:26:53 AM
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