private void button3_Click(object sender, EventArgs e)
{
CipherSDES cipherText = new CipherSDES(textBox5.Text, textBox2.Text, textBox3.Text);
textBox6.Text = cipherText.makeAction("Decrypt");
}
private void button2_Click(object sender, EventArgs e)
{
CipherSDES plainText = new CipherSDES(textBox4.Text, textBox2.Text, textBox3.Text);
textBox5.Text = plainText.makeAction("Encrypt");
}