public override List <Cours> getElements() { TrainingCenterEntities oEntities = ConnectionEntities.getTrainingCenter(mAcount); var oData = oEntities.SP_GETALL_COURSE().ToList(); List <Cours> lisCourse = new List <Cours>(); foreach (var o in oData) { Cours oCourse = new Cours { Id = o.Id, CourseName = o.CourseName }; lisCourse.Add(oCourse); } return(lisCourse.Count <= 0 ? null : lisCourse); }