private void Button_Click(object sender, RoutedEventArgs e) { bool check = Requests.MethodsAdmininstrator.Check(new Context(), Login.Text, Password.Text); if (check == true) { Entities.Waiter w = Requests.MethodsWaiter.GetWaiterByLogin(context, Login.Text); MakingOrder mo = new MakingOrder(w.WaiterID); mo.Show(); MainWindow mw = new MainWindow(); mw.Show(); this.Close(); } else { MessageBox.Show("Логин или пароль введены неверно."); } }