I have read that MSXML 4-6 only support XPath 1.0 which does not support 
default namespaces.

We have a legacy application in cpp (unmanaged, several actually) that needs 
to interoperate with .net, since we are trying to migrate to .net when and 
where we can. But I keep running into system level software that do not 
support the same levels of specifications, in this case, xpath.

In this particular application there is a class that is serialized with the 
DataContractSerializer and then reloaded in the cpp application. Sounds good 
but, the xml is created using a default namespace that will load in MSXML 
6.0 but you can not do a selectNodes or selectSingleNode.

I would have thought that someone would have considered this when 
implementing the xml parsers. It looks like the .net group goes on totally 
independant of the rest of the world, or the native guys just don't bother 
to keep up.

Is there a way to serialize the class in .net so it can be utilized in cpp 
with MSXML 6.0 and not destroy the wcf functionality?