XmlValidatingReader.ValidationEventHandler problem

[Nick Finch]

Hi,

I wonder if anyone else has come across this. The code below is very
simple however I cannot get the ValidationHandler to be raised. I am
testing with xml that I know will not validate against the XmlSchema
that I have added to the Schemas collection of the
XmlValidatingReader. I also know that the schema is sound, if I
comment out the delegate assignment and wrap the code in a try/catch
then I get the exception that I expect.

public class SubmissionManager
{

public SubmissionManager(){}

public void ValidateSubmission(SubmissionSpecification
submissionSpecification, XmlDocument data)
{
XmlTextReader tr = new XmlTextReader(new
StringReader(data.DocumentElement.OuterXml));
XmlValidatingReader vr = new XmlValidatingReader(tr);
vr.ValidationType = ValidationType.Schema;
vr.ValidationEventHandler += new
ValidationEventHandler(SubmissionManager.Validatio nHandler);
vr.Schemas.Add(XmlSchema.Read(new
StringReader(submissionSpecification.XmlSchema), null));
while(vr.Read());
}

public static void ValidationHandler(object sender,
ValidationEventArgs args)
{
Console.WriteLine(args.Message);
}

}

I read a post saying that this was caused by a patch that might have
been applied. My development environment is up to date with all
patches as of today. I could of course just catch the exception and
continue from there but I would like to access the severity property
of the ValidationEventHandler.

Cheers
Nick