private void btnTL_Click(object sender, EventArgs e)
{
FormLoaiKH lh = new FormLoaiKH();
lh.Show();
}
private void navBarItem1_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
{
FormLoaiKH khl = new FormLoaiKH();
khl.Show();
}