public void RetourneCodeOperation()
 {
     try
     {
         InterfaceComptableServiceClient service = new InterfaceComptableServiceClient(Utility.ProtocoleIndex(), Utility.EndPoint("InterfaceComptable"));
         service.RetourneCodeOperationCompleted += (s, args) =>
         {
             try
             {
                 if (args.Cancelled || args.Error != null
                     )
                 {
                     string error = args.Error.InnerException.ToString();
                     return;
                 }
                 else
                 {
                     if (args.Result != null && args.Result.Count != 0)
                     {
                         ListeOperation = args.Result;
                     }
                 }
             }
             catch (Exception ex)
             {
                 Message.ShowError(ex, Galatee.Silverlight.Resources.Caisse.Langue.errorTitle);
             }
         };
         service.RetourneCodeOperationAsync();
     }
     catch (Exception ex)
     {
         throw ex;
     }
 }