private string GenerateQRCodeUrl(string content, QRCodeSize size, QRErrorCorrection errorCorrection)
        {
            var baseUrl = "http://chart.apis.google.com/chart?cht=qr&chs={0}x{0}&chld={1}&choe=UTF-8&chl={2}";

            return(string.Format(baseUrl, (int)size, errorCorrection.ToString(), Uri.EscapeDataString(content)));
        }
    private string GenerateQRCodeUrl(string content, QRCodeSize size, QRErrorCorrection errorCorrection)
    {
      var baseUrl = "http://chart.apis.google.com/chart?cht=qr&chs={0}x{0}&chld={1}&choe=UTF-8&chl={2}";

      return string.Format(baseUrl, (int)size, errorCorrection.ToString(), Uri.EscapeDataString(content));
    }