private void button2_Click(object sender, EventArgs e)
{
key = Base32Encoder.Decode(textBox2.Text);
otp = new Totp(key);
label3.Text = otp.ComputeTotp();
timer1.Enabled = true;
}
private void button1_Click(object sender, EventArgs e)
{
key = KeyGeneration.GenerateRandomKey(40);
textBox1.Text = Base32Encoder.Encode(key);
otp = new Totp(key);
label1.Text = otp.ComputeTotp();
var url = KeyUrl.GetTotpUrl(key, "VERYVERYVERYVERYLONG");
label2.Text = url;
writer.Format = BarcodeFormat.QR_CODE;
writer.Options.PureBarcode = false;
writer.Options.Margin = 0;
writer.Options.Width = 175;
writer.Options.Height = 175;
var matrix = writer.Encode(url);
pictureBox1.Image = render.Render(matrix, BarcodeFormat.QR_CODE, string.Empty);
pictureBox1.Invalidate();
timer1.Enabled = true;
}