private void Kitaplar_Load(object sender, EventArgs e)
{
LoadBooks();
List <AuthorModel> authors = AuthorHelper.MapAuthorEntity(AuthorHelper.ListAuthors());
listBox1.DataSource = authors;
listBox1.SelectionMode = SelectionMode.MultiSimple;
List <GenreModel> genres = GenreHelper.MapGenreEntity(GenreHelper.ListGenres());
listBox2.DataSource = genres;
listBox2.SelectionMode = SelectionMode.MultiSimple;
}