private void btn_gérerClient_Click(object sender, RoutedEventArgs e)
        {
            GérerCréditClient gererCreditClient = new GérerCréditClient(myclient, mytransaction);

            gererCreditClient.Show();
            this.Close();
        }
 private void Button_Click(object sender, RoutedEventArgs e)
 {
     if (Rbtn_AffichageTransactions.IsChecked == true)
     {
         FenetreTransactions Transaction = new FenetreTransactions(myclient, mytransaction);
         Transaction.Show();
         this.Close();
     }
     if (Rbtn_gérerClient.IsChecked == true)
     {
         GérerClients gererClient = new GérerClients(myclient, mytransaction);
         gererClient.Show();
         this.Close();
     }
     if (Rbtn_GérerCrédit.IsChecked == true)
     {
         GérerCréditClient gererCreditClient = new GérerCréditClient(myclient, mytransaction);
         gererCreditClient.Show();
         this.Close();
     }
 }