Hello, > I would love to work on it. Where will I find specs for it? About XmlValidatingReader? :) It is not documented in ECMA, and seems not available in monodoc, so I suggest MSDN from here: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ cpref/html/frlrfsystemxmlxmlvalidatingreaderclasstopic.asp Cheers, Atsushi Eno