void ChargerIndexCampagne(int Regroupement) { Galatee.Silverlight.ServiceRecouvrement.RecouvrementServiceClient service = new Galatee.Silverlight.ServiceRecouvrement.RecouvrementServiceClient(Utility.ProtocoleFacturation(), Utility.EndPoint("Recouvrement")); service.ChargerClientPourSaisiIndexCompleted += (s, args) => { if (args != null && args.Cancelled) { return; } List <CsDetailCampagne> lstCampagne = args.Result; lvwResultat.ItemsSource = null; lvwResultat.ItemsSource = lstCampagne; return; }; service.ChargerClientPourSaisiIndexAsync(Regroupement); }