运行dnx web时无法加载程序集错误

我已经使用Yeoman asp.net生成器的模板创建了一个asp.net web API项目。我可以使用dnu build命令成功构建它，但是当我运行dnx web时，它给了我这个错误:

  System.IO.FileLoadException: Could not load file or assembly 'System.Threading.Overlapped, Version=4.0.1.0, Culture=neut
ral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The located assembly's manifest definition does not ma
tch the assembly reference. (Exception from HRESULT: 0x80131040)
File name: 'System.Threading.Overlapped, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'
   at Microsoft.Net.Http.Server.WebListener.CloseRequestQueueHandle()
   at Microsoft.Net.Http.Server.WebListener.Start()
   at Microsoft.AspNet.Server.WebListener.MessagePump.Start(Func`2 app)
   at Microsoft.AspNet.Server.WebListener.ServerFactory.Start(IServerInformation server, Func`2 app)
   at Microsoft.AspNet.Hosting.Internal.HostingEngine.Start()
   at Microsoft.AspNet.Hosting.Program.Main(String[] args)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.Dnx.Runtime.Common.EntryPointExecutor.Execute(Assembly assembly, String[] args, IServiceProvider service
Provider)
   at Microsoft.Dnx.ApplicationHost.Program.ExecuteMain(DefaultHost host, String applicationName, String[] args)
   at Microsoft.Dnx.ApplicationHost.Program.Main(String[] args)
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
   at Microsoft.Dnx.Runtime.Common.EntryPointExecutor.Execute(Assembly assembly, String[] args, IServiceProvider service
Provider)
   at Microsoft.Dnx.Host.Bootstrapper.RunAsync(List`1 args, IRuntimeEnvironment env, String appBase, FrameworkName targe
tFramework)
   at Microsoft.Dnx.Host.RuntimeBootstrapper.ExecuteAsync(String[] args, BootstrapperContext bootstrapperContext)
   at Microsoft.Dnx.Host.RuntimeBootstrapper.Execute(String[] args, BootstrapperContext bootstrapperContext)

我在windows 7 x64上使用coreclr 1.0.0-rc1-15798 coreclr x64。我可以从https://github.com/aspnet/home

运行模板

项目。json 文件:

{
  "webroot": "wwwroot",
  "version": "1.0.0-*",
  "dependencies": {
    "Microsoft.AspNet.Mvc": "6.0.0-beta7",
    "Microsoft.AspNet.Server.IIS": "1.0.0-beta7",
    "Microsoft.AspNet.Server.Kestrel": "1.0.0-beta7",
    "Microsoft.AspNet.Server.WebListener": "1.0.0-beta7",
    "Microsoft.AspNet.StaticFiles": "1.0.0-beta7"
  },
  "commands": {
    "kestrel": "Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.Kestrel --config hosting.ini",
    "web": "Microsoft.AspNet.Hosting --server Microsoft.AspNet.Server.WebListener --config hosting.ini"
  },
  "frameworks": {
    "dnx451": {},
    "dnxcore50": {}
  },
  "exclude": [
    "wwwroot",
    "node_modules",
    "bower_components"
  ],
  "publishExclude": [
    "node_modules",
    "bower_components",
    "**.xproj",
    "**.user",
    "**.vspscc"
  ]
}