"Concretising" generics - for WPF service

[Merrion]

(Looking for thoughts...)

So - when you create a WCF service with a [ServiceContract()] and [DataContract()] you can't use open generics - which I do understand why.

However - anyone have any ideas about how I could specify a small set of types and have the generics turned into concrete implementations in the service ? (Probably looking at codegen??)

i.e. if I have a function like Add(Of TParam)(Byval lhs As TParam, ByVal rhs As TParam) As TParam I'd like it to generate:-

AddInteger(Byval lhs As Integer, Byval rhs As Integer) As Integer

AddDouble(Byval lhs As Double, Byval rhs As Double) As Double

(etc.)