void Recherche(DateTime?datedebut, DateTime?datefin)
        {
            try
            {
                detailcampagnes         = new List <CsDetailCampagne>();
                lvwResultat.ItemsSource = null;
                RecouvrementServiceClient client = new RecouvrementServiceClient(Utility.ProtocoleFacturation(), Utility.EndPoint("Recouvrement"));
                client.EditerCLientaPoserAsync(datedebut, datefin);
                client.EditerCLientaPoserCompleted += (ss, args) =>
                {
                    try
                    {
                        if (args.Cancelled || args.Error != null)
                        {
                            string error = args.Error.Message;
                            Message.ShowError("Erreur à l'exécution du service", "SearchCampagne");
                            return;
                        }

                        if (args.Result == null || args.Result.Count == 0)
                        {
                            Message.ShowInformation("Aucune donnée trouvée", "SearchCampagne");
                            return;
                        }
                        detailcampagnes         = args.Result;
                        lvwResultat.ItemsSource = null;
                        lvwResultat.ItemsSource = detailcampagnes;
                    }
                    catch (Exception ex)
                    {
                        Message.ShowError(ex, Galatee.Silverlight.Resources.Langue.errorTitle);
                    }
                };
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }