private void ButtonListContact_Click(object sender, RoutedEventArgs e)
        {
            ListeDesContacts list = new ListeDesContacts(this, user);

            list.Show();
            this.Hide();
        }
        public Update(Contact ctc, ListeDesContacts acceuil)
        {
            this.contact = ctc;
            InitializeComponent();
            TextBoxNom.Text       = contact.Nom;
            TextBoxPrenom.Text    = contact.Prenom;
            TextBoxTelephone.Text = contact.Telephone;
            TextBoxAdresse.Text   = contact.Adresse;
            TextBoxVille.Text     = contact.Ville;
            TextBoxEtat.Text      = contact.Etat;
            TextBoxPays.Text      = contact.Pays;

            this.acceuil = acceuil;
        }