private static void ValidationCallback( object sender, ValidationEventArgs args )
{
if (args.Severity == XmlSeverityType.Warning)
Console.Write( @"WARNING: " );
else if (args.Severity == XmlSeverityType.Error)
{
_validationErrors.Append( args.Message ).Append( "<br/>" );
Console.Write( @"ERROR: " );
}
Console.WriteLine( args.Message );
}