public IEnumerable <specialization> Allspecialization() //ienumerable of specialization { return(dal.Allspecialization()); //return the fonction allspialisation of the dal(return of the list of specialisation) }
public IEnumerable <specialization> Allspecialization(Func <specialization, bool> predicate = null) { return(dal.Allspecialization(predicate)); }