internal void NouveauExercice() { var exercices = _service.ExerciceGetAll().ToList(); var currentExercice = _service.Exercice; var annee = Convert.ToInt32(currentExercice.Annee); while (exercices.Any(x => x.Annee == annee.ToString())) { annee++; } _service.ExerciceCreate(annee.ToString()); }