private void button1_Click_1(object sender, EventArgs e)
{
string plain = textBox1.Text;
string key = textBox2.Text;
DESalgo k = new DESalgo();
string cipher = k.DesEncrypttion(key, plain);
textBox3.Text = cipher;
}
private void button2_Click_1(object sender, EventArgs e)
{
string cipher = textBox1.Text;
string key = textBox2.Text;
DESalgo k = new DESalgo();
string plain = k.DesDecryption(key, cipher);
textBox3.Text = plain;
}