private void btnThemBanDoc_Click(object sender, EventArgs e)
{
frmThemBanDoc f = new frmThemBanDoc(this);
f.ShowDialog();
}
/// <summary>
/// Event menu strip
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void thêmBạnĐọcToolStripMenuItem_Click(object sender, EventArgs e)
{
frmThemBanDoc f = new frmThemBanDoc(this);
f.ShowDialog();
}