使用DNX时出现框架不兼容问题

我创建了一个ASP。NET MVC 6 web应用程序项目“OpsTools”。项目json文件为:

    {
      "webroot": "wwwroot",
      "version": "1.0.0-*",
      "dependencies": {
        "Microsoft.AspNet.Diagnostics": "1.0.0-beta6",
        "Microsoft.AspNet.Mvc": "6.0.0-beta6",
        "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-beta6",
        "Microsoft.AspNet.Server.IIS": "1.0.0-beta6",
        "Microsoft.AspNet.Server.WebListener": "1.0.0-beta6",
        "Microsoft.AspNet.StaticFiles": "1.0.0-beta6",
        "Microsoft.AspNet.Tooling.Razor": "1.0.0-beta6",
        "Microsoft.Framework.Configuration.Json": "1.0.0-beta6",
        "Microsoft.Framework.Logging": "1.0.0-beta6",
        "Microsoft.Framework.Logging.Console": "1.0.0-beta6",
        "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-beta6",
        "EntityFramework": "6.1.3",
        "jqGridWebApi": "1.1.4",
        "OrionSharedObjects": "4.7.0.1",
        "EnyimMemcached": "2.13.0",
        "CouchbaseNetClient": "1.2.7",
        "xunit": "2.2.0-beta1-build3239",
        "Moq": "4.2.1510.2205"
      },
      "commands": {
        "web": "Microsoft.AspNet.Hosting --config hosting.ini"
      },
      "frameworks": {
        "dnx451": {
          "frameworkAssemblies": {
            "System.Data": "4.0.0.0"
          }
        }
      },
      "exclude": [
        "wwwroot",
        "node_modules",
        "bower_components"
      ],
      "publishExclude": [
        "node_modules",
        "bower_components",
        "**.xproj",
        "**.user",
        "**.vspscc"
      ],
      "scripts": {
        "prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ]
      },
      "configurations": {
        "Staging": { }
      }
    }

然后,我在解决方案中添加了一个用于单元测试的新类包库项目。我试图引用第一个项目。我发现了这个项目。第二个项目中的json是:

    {
  "version": "1.0.0-*",
  "projectUrl": "",
  "licenseUrl": "",

  "frameworks": {
    "dnx451": {
      "dependencies": {
        "OpsTools": "1.0.0-*"
      }
    },
    "dnxcore50": { }
  }
}

问题是我有很多编译错误。基本上是

找不到类型或命名空间名称“System”(是否缺少using指令或程序集引用?)操作工具测试。DNX Core 5.0 C:\Source\Optools\src\OpsTools.Test\Properties\AssemblyInfo.cs