private void btnExitColumn_Click(object sender, EventArgs e)
{
BookInfoEditRows_UI b = new BookInfoEditRows_UI();
b.Reader = this;
b.ShowDialog();
}
private void button3_Click(object sender, EventArgs e)
{
BookInfoEditRows_UI b = new BookInfoEditRows_UI();
b.Book = this;
b.ShowDialog();
}