c# - Mocking session state with Rhino mocks -

i trying perform test operation on complex methods handles complex objects. in uses sessionmanager class customer class properties , handles session context stuff.

i have below code trying mock sessionstate , override value returned promotiondto property returned sessionmanager class.

   sessionmanager sessionstub = mockrepository.generatestub<sessionmanager>( mockobjectfactory.getmockhttpsessionstate());          var dto = new promotionparamsdto(store.defaultadcode, membershiptypefromresult.membershiptype.id, offercodes, true);           sessionstub.stub(x => x.promotiondto).return(dto); 

i facing below error @ last line trying stub value

invalid call, last call has been used or no call has been made (make sure calling virtual (c#) / overridable (vb) met

  @ rhino.mocks.lastcall.getoptions[t]()   @ rhino.mocks.rhinomocksextensions.expect[t,r](t mock, function`2 action)   @ rhino.mocks.rhinomocksextensions.stub[t,r](t mock, function`2 action)   @ bluefield.test.membershippromo.membershipinfoservicestest.checkandrunpromoformembershiptypetest() 

i using mockobjectfactory implementation here http://codeverge.com/asp.net.free-for-all/mocking-httpcontext-object/36423

kindly me here, thanks.

nevermind, had changed property trying stub overridable , set values directly fix problem.