private void buttonSave_Click(object sender, EventArgs e) {
   ClientSelection client = (ClientSelection)comboBoxClients.SelectedItem;
   FeelingType feelingtype = (FeelingType)comboBoxFeeling.SelectedItem;
   if((client != null) && (feelingtype != null)) {
     try {
       using(ProjetSGBDEntities context = new ProjetSGBDEntities()) {
         context.NewFeeling(CurrentClient.Id, client.Id, feelingtype.Id, CurrentClient.Acronym);
       }
     } catch(Exception ex) {
       ModelError modelError = new ModelError(ex);
       MessageBox.Show(modelError.Message, "Erreur fatale!", MessageBoxButtons.OK, MessageBoxIcon.Error);
       DialogResult = DialogResult.None;
     }
   }
 }