private void button1_Click(object sender, EventArgs e) { try { UserModel user = _userService.Connexion(userEmail.Text, userPassword.Text); if (user != null) { Menu menu = new Menu(); menu.Show(); this.Hide(); } else { MessageBox.Show("Vérifier votre E-mail ou Mot de passe"); } } catch (Exception ex) { MessageBox.Show(ex.ToString()); } }