Serializable Web Service objects.

Is there a way to make web service objects binary serializable by the clients?
I know the client can reference the service then add the [Serializable] attribute to the reference.cs file where needed, but is there away to have this attribute added automatically when the WSDL file is interogated.

I know with remoting which is fairly similar you can add the formatter in the config file. I dare say there's something similar within web services.