c# - ODATA Separating the SERVICE from the DATA -

i have app 3 layers: a) service exposing web api odata b) business layer business logic , data access c) model

if use odata queries directly in service, accessing db context, works ok, issues is....how can achieve same, adding 1 layer in middle?

myservice web api 2

[enablequery]     public iqueryable<individual> getindividuals()     {          individualbo bo = new individualbo();         return bo.getallindividuals();     } 

my business layer

public iqueryable<individual> getallindividuals()     {         using (mycontext context = new mycontext())         {             return context.individuals;         }     }  

this not working......however if remove bo equation, works fine....any ideas?