[Solved] ASP.Net Error: The type name QRCode does not exist in the type QRCodeGenerator

clonekoadi says:

QRCodeGenerator qrGenerator = new QRCodeGenerator();

QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(code, QRCodeGenerator.ECCLevel.Q);

Change above code with below.

QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeData qrCodeData = qrGenerator.CreateQrCode(code, QRCodeGenerator.ECCLevel.Q);
QRCode qrCode = new QRCode(qrCodeData);

Updated code.

private byte[] GenerateQrCode(string qrmsg)
{
    string code = qrmsg;
    QRCodeGenerator qrGenerator = new QRCodeGenerator();
    QRCodeData qrCodeData = qrGenerator.CreateQrCode(code, QRCodeGenerator.ECCLevel.Q);
    QRCode qrCode = new QRCode(qrCodeData);
    System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();
    imgBarCode.Height = 150;
    imgBarCode.Width = 150;
    using (Bitmap bitMap = qrCode.GetGraphic(20))
    {
        using (MemoryStream ms = new MemoryStream())
        {
            bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
            byte[] byteImage = ms.ToArray();
            return byteImage;
        }
    }
}