private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            if (EmployeesViewModel == null)
                return;

            EmployeesViewModel.Dispose();
            EmployeesViewModel = null;
        }
 private void Button_Click_Northwind(object sender, RoutedEventArgs e)
 {
     if (EmployeesViewModel == null)
         EmployeesViewModel = _viewModelFactory.CreateScoped<EmployeesVM>();
 }