private void InsertButton_Click(object sender, RoutedEventArgs e)
{
Review newReview = new Review();
EditWindow window = new EditWindow();
window.DataContext = newReview;
if (window.ShowDialog() == true)
{
Movie selectedMovie = _moviesList.SelectedItem
as Movie;
newReview.Movie = selectedMovie;
_db.Reviews.InsertOnSubmit(newReview);
_db.SubmitChanges();
((IList <Review>)_reviewsList.ItemsSource).Add(newReview);
}
}