private void btnGiaiMa_Click(object sender, EventArgs e)
{
var chuoiBanDau = Ceasar.Decrypt(txtChuoiNhap.Text.ToUpper(), int.Parse(txtK.Text));
//MessageBox.Show(chuoiBanDau);
txtKetQua.Text = chuoiBanDau;
}
private void btnMaHoa_Click(object sender, EventArgs e)
{
var chuoiDaMaHoa = Ceasar.Encrypt(txtChuoiNhap.Text.ToUpper(), int.Parse(txtK.Text));
//MessageBox.Show(chuoiDaMaHoa);
txtKetQua.Text = chuoiDaMaHoa;
}