.NetCore make QrCode for bitcoin/cryptos address

QrCodeView.cs

[Route("qr/{value}")]
public IActionResult Qr(string value)
{
    var memoryStream = new MemoryStream();
    var qrGenerator = new QRCodeGenerator();
    var qrCodeData = qrGenerator.CreateQrCode(value, QRCodeGenerator.ECCLevel.L);
    var qrCode = new QRCode(qrCodeData);
    qrCode.GetGraphic(20).Save(memoryStream, ImageFormat.Png);
    return File(memoryStream.ToArray(), "image/png");
}