WorkList and WorkListitem not serializable

I'm currently working on an N-Tier ditributed application that has:

A SmartClient deployed via ClickOnce

It's own Business Logic layer

and is going to be using K2 BlackPearl to control workflow.




As part of the prototyping process I am trying to write a business object that retrieves a user's WorkList and then returns it to the smart client for the user to see. The call into my business object is being done across the wire via WCF service that can transfer any serializable object. When I went to go run my code I discovered that the WorkList and WorkListItem classes are not marked with the Seriializable attribute and thus I am unable to transfer them across the wire. Does any know the reasons for this and is there some sort of alternative object or code on the black market that would accomplish the same thing.





Thanks in advance