Yes, I know, but I mean a way to instruct wsdl.exe to reference some
assemblies and, if a serialized object is from the referenced assembly, use
that class instead of creating a new one.

This way, if you are both the server and the client developer, you can add
methods to server classes and reuse them in your client applications, as
long as they reference the original assembly.

How do Datasets manage to get deserialized as Datasets instead of a wsdl.exe
created proxy class?

I suppose it must have something to do with the assembly being in the GAC,
or some Xml related attribute or interface, but I can't find it.

Any clues?

Thanks a lot