自己参考QrCode.Net开源实例封装了一个生成二维码的静态方法如下：

/// <summary>    /// 含有QR码的描述类和包装编码和渲染    /// </summary>    public class QRCodeHelper    {        /// <summary>        /// 获取二维码        /// </summary>        /// <param name="strContent">待编码的字符</param>        /// <param name="ms">输出流</param>        ///<returns>True if the encoding succeeded, false if the content is empty or too large to fit in a QR code</returns>        public static bool GetQRCode(string strContent, MemoryStream ms)        {            ErrorCorrectionLevel Ecl = ErrorCorrectionLevel.M; //误差校正水平             string Content = strContent;//待编码内容            QuietZoneModules QuietZones = QuietZoneModules.Two;  //空白区域             int ModuleSize = 12;//大小            var encoder = new QrEncoder(Ecl);            QrCode qr;            if (encoder.TryEncode(Content, out qr))//对内容进行编码，并保存生成的矩阵            {                var render = new GraphicsRenderer(new FixedModuleSize(ModuleSize, QuietZones));                render.WriteToStream(qr.Matrix, ImageFormat.Png, ms);            }            else            {                return false;            }             return true;        }     }

vs2010 framework3.5 引用的组件是QrCode.Net 0.4 Pre-Release\Gma.QrCodeNet.Encoding.Net35
  public ActionResult Index()        {                         // Render the QR code as an image            using (var ms = new MemoryStream())            {                string stringtest="中国inghttp://www.baidu.com/mvc.test?&";                QRCodeHelper.GetQRCode(stringtest, ms);                Response.ContentType = "image/Png";                Response.OutputStream.Write(ms.GetBuffer(), 0, (int)ms.Length);                 Response.End();            }                         return View();        }