---

public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            ConnectToDb.conDb = new demkaEntities();
            FrameObj.frameObj = MainFrame;

            MainFrame.Navigate(new UsersPage());
        }
        private void UsersBtn_Click(object sender, RoutedEventArgs e)
        {
            MainFrame.Navigate(new UsersPage());
        }

        private void ProductsBtn_Click(object sender, RoutedEventArgs e)
        {
            MainFrame.Navigate(new ProductsPage());
        }

        private void ThirdBtn_Click(object sender, RoutedEventArgs e)
        {
            MainFrame.Navigate(new PointsPage());
        }
    }