private void EditAuthor()
{
selectedAuthor = dataGridViewAuthors.SelectedRows[0].Tag as Author;
FormAddorEditNewAuthor newAuthor = new FormAddorEditNewAuthor(authors, selectedAuthor);
newAuthor.ShowDialog();
selectedAuthor = null;
}
private void AddNewAuthor()
{
FormAddorEditNewAuthor newAuthor = new FormAddorEditNewAuthor(authors, selectedAuthor);
newAuthor.ShowDialog();
}