private void Supprimer_Click(object sender, RoutedEventArgs e)
 {
     try
     {
         if (dgImport.SelectedItem != null)
         {
             var  objetselectionne = (aImportFichier)dgImport.SelectedItem;
             bool result           = false;
             AdministrationServiceClient service1 = new AdministrationServiceClient(Utility.ProtocoleFacturation(), Utility.EndPoint("Administration"));
             service1.SuppressImportFichierCompleted += (sr, res) =>
             {
                 if (res != null && res.Cancelled)
                 {
                     return;
                 }
                 result = res.Result;
                 if (result == true)
                 {
                     ChargeGrid();
                     MessageBox.Show("Supprimé");
                 }
                 else
                 {
                     MessageBox.Show("Echec");
                 }
             };
             service1.SuppressImportFichierAsync(objetselectionne);
             service1.CloseAsync();
         }
     }
     catch (Exception ex)
     {
         Message.ShowError(ex.Message, "Echec");
     }
 }