private void btnEdit_Click(object sender, EventArgs e)
{
int index = dgvBooks.CurrentRow.Index;
FormAddEditBook editBook = new FormAddEditBook(dgvBooks.SelectedCells[0].Value.ToString());
editBook.ShowDialog();
}
private void btnAdd_Click(object sender, EventArgs e)
{
FormAddEditBook addbook = new FormAddEditBook();
addbook.ShowDialog();
}