// show QRCode for typed adress
private void qrCodeBtn_Click(object sender, EventArgs e)
{
var adress = textBoxBitcoinAdress.Text.Trim();
if (!String.IsNullOrEmpty(adress))
{
var qrCodeImage = QRCodeHelper.GenerateQRCodeFromAdress(adress);
QRCodeForm qrCodeForm = new QRCodeForm(qrCodeImage);
qrCodeForm.Show();
}
}