C# YuiCompressor.NET:重写成员时违反了继承安全规则

我试图用YuiCompressor nuget包混淆我的js文件

安装包（“Yui Compressor.NET”+“Yui Compressor.NET-Web.Optimization”）后，我用以下代码更新了BundleConfig文件：

JavaScriptCompressorConfig jsConfig = new JavaScriptCompressorConfig();
YuiCompressorTransform jsTransfrom = new YuiCompressorTransform(jsConfig);
var script = new Bundle("~/bundles/name", jsTransfrom);
script.Include("~/content/file.js");
bundles.Add(script);

运行代码时，出现以下错误：

System.TypeLoadException: Inheritance security rules violated while overriding member: 'Yahoo.Yui.Compressor.Web.Optimization.YuiCompressorTransform.Process(System.Web.Optimization.BundleContext, System.Web.Optimization.BundleResponse)'. Security accessibility of the overriding method must match the security accessibility of the method being overriden.
   at MySln.UI.Website.BundleConfig.RegisterBundles(BundleCollection bundles)
   at MySln.UI.Website.MvcApplication.Application_Start() in c:\TFS\MySln\UserInterface\Website\Global.asax.cs:line 23

我正在运行VS 2013+.net framework 4.5

我怎么能解决这个问题

谢谢大家!