public void OpenDatabaseExplorer()
        {
            CarWorkshopDBContext context          = new CarWorkshopDBContext();
            Repository           clientRepository = new Repository(context);

            ShellViewModel viewModel = new ShellViewModel(clientRepository);
            Shell          s1        = new Shell(viewModel);

            s1.Show();

            CarViewModel viewModel1 = new CarViewModel(clientRepository);
            CarsWindow   c1         = new CarsWindow(viewModel1);

            c1.Show();

            RepairViewModel viewModel2 = new RepairViewModel(clientRepository);
            RepairsWindow   r1         = new RepairsWindow(viewModel2);

            r1.Show();

            MechanicViewModel viewModel3 = new MechanicViewModel(clientRepository);
            MechanicsWindow   m1         = new MechanicsWindow(viewModel3);

            m1.Show();
        }
        private void CarsButton_Click(object sender, RoutedEventArgs e)
        {
            CarsWindow window = new CarsWindow(new CarsViewModel());

            window.Show();
        }