private void linkLabel5_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
ViPham frm = new ViPham();
frm.Show();
this.Hide();
}
private void quảnLýViPhạmToolStripMenuItem_Click(object sender, EventArgs e)
{
ViPham frm = new ViPham();
frm.Show();
this.Hide();
}