void ChargerCampagne(int Regroupement) { Galatee.Silverlight.ServiceRecouvrement.RecouvrementServiceClient service = new Galatee.Silverlight.ServiceRecouvrement.RecouvrementServiceClient(Utility.ProtocoleFacturation(), Utility.EndPoint("Recouvrement")); service.ChargerCampagneCompleted += (s, args) => { if (args != null && args.Cancelled) { return; } List <CsCampagneGc> lstCampagne = args.Result; this.Cbo_Campagne.ItemsSource = null; this.Cbo_Campagne.DisplayMemberPath = "NUMEROCAMPAGNE"; this.Cbo_Campagne.ItemsSource = lstCampagne; return; }; service.ChargerCampagneAsync(Regroupement); }