private void button2_Click(object sender, EventArgs e)
{
CipherAlgorithm ca = new CipherAlgorithm();
tbPT.Text = ca.Decrypt(tbCT.Text, "sblw-3hn8-sqoy19");
}
private void button1_Click(object sender, EventArgs e)
{
CipherAlgorithm ca = new CipherAlgorithm();
tbCipherText.Text = ca.Encrypt(tbPlainText.Text, "sblw-3hn8-sqoy19");
}