I'm not sure I understand the goal here, could you explain it a little more?
If you have a method in your service application that you need to reference
elsewhere, why not make a class library and build the library. Reference the
..dll from your service application and all is well. You can install this to
the GAC or add a reference from any other project and you should be good to
go.
Otherwise I'm not sure I know what you mean by referencing a method. Let me
know and hopefully I can answer it for you.
