private void btnThemKhachMoi_Click(object sender, EventArgs e)
        {
            frmKhachThue frm = new frmKhachThue();

            frm.Show();
        }
        private void quảnLýKháchThuêToolStripMenuItem_Click(object sender, EventArgs e)
        {
            frmKhachThue frm = new frmKhachThue();

            frm.Show();
        }
 private void quảnLýKháchThuêToolStripMenuItem_Click(object sender, EventArgs e)
 {
     frmKhachThue frm = new frmKhachThue();
     frm.Show();
 }
 private void btnThemKhachMoi_Click(object sender, EventArgs e)
 {
     frmKhachThue frm = new frmKhachThue();
     frm.Show();
 }