C# 升级到ASP.NET MVC6 beta7后打开现有项目的例外情况

我正在使用Visual Studio 2015社区版，并将现有的ASP.NET MVC6应用程序更新为beta7。现在我无法再打开项目了。Visual Studio崩溃，出现以下异常：

08.09.2015 20:23:12
Crippling
System.AggregateException: One or more errors occurred. ---> Microsoft.Assumes+InternalErrorException: The specified default content type (Default) is not defined in the project item schema.
   at Microsoft.Assumes.Fail(String message, Boolean showAssert)
   at Microsoft.VisualStudio.ProjectSystem.Items.ProjectItemSchemaManagerBase.<ComputeCacheDataAsync>d__15.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.Items.ProjectItemSchemaManager.<CreateSchemaFromSnapshotDataAsync>d__21.MoveNext()
   --- End of inner exception stack trace ---
---> (Inner Exception #0) Microsoft.Assumes+InternalErrorException: The specified default content type (Default) is not defined in the project item schema.
   at Microsoft.Assumes.Fail(String message, Boolean showAssert)
   at Microsoft.VisualStudio.ProjectSystem.Items.ProjectItemSchemaManagerBase.<ComputeCacheDataAsync>d__15.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at Microsoft.VisualStudio.ProjectSystem.Items.ProjectItemSchemaManager.<CreateSchemaFromSnapshotDataAsync>d__21.MoveNext()<---

My global.json如下所示：

{
    "projects": [ "src", "test" ],
    "sdk": {
        "version": "1.0.0-beta7"
    }
}

删除sdk部件不会改变任何事情

编辑：这是我的项目。json

{
    "webroot": "wwwroot",
    "version": "1.0.0-*",

    "dependencies": {
        "Microsoft.AspNet.Mvc": "6.0.0-*",
        "Microsoft.AspNet.Server.IIS": "1.0.0-*",
        "Microsoft.AspNet.Server.WebListener": "1.0.0-*",
        "Microsoft.AspNet.StaticFiles": "1.0.0-*",
        "Microsoft.AspNet.Diagnostics": "1.0.0-*",
        "Microsoft.Framework.Configuration.Json": "1.0.0-*",
        "Microsoft.AspNet.Authentication": "1.0.0-*"
    },

    "commands": {
        "web": "Microsoft.AspNet.Hosting --config hosting.ini"
    },

    "frameworks": {
        "dnx451": { },
        "dnxcore50": { }
    },

    "compilationOptions": {
        "allowUnsafe": true
    },

    "exclude": [
        "wwwroot",
        "node_modules",
        "bower_components"
    ],
    "publishExclude": [
        "node_modules",
        "bower_components",
        "**.xproj",
        "**.user",
        "**.vspscc"
    ]
}

---

我也有同样的问题。我尝试重新安装网络工具以及修复VS（专业版）

文件->新建项目引发了相同的错误

我的解决方案是安装德语语言包（我使用的是德语Visual Studio）。问题是，当我第一次安装beta7时，语言包由于一个我不记得的错误而中止，但当我重试时，它成功了

---

尊敬Daniel

你能分享

project.json

文件吗？@VictorHurdugaci，当然可以。你也把工具更新到beta7了吗？beta7之前的工具不适用于beta-7项目…@Pawel I安装了Microsoft ASP.NET和Web tools 2015（beta7）。我错过了什么吗？还有一件事要尝试。关闭VS，然后删除位于%localappdata%\Microsoft\VisualStudio\14.0\ComponentModelCache的文件夹并重新启动谢谢。似乎beta版web工具在国际化方面存在问题谢谢，这正是问题所在

{
    "webroot": "wwwroot",
    "version": "1.0.0-*",

    "dependencies": {
        "Microsoft.AspNet.Mvc": "6.0.0-*",
        "Microsoft.AspNet.Server.IIS": "1.0.0-*",
        "Microsoft.AspNet.Server.WebListener": "1.0.0-*",
        "Microsoft.AspNet.StaticFiles": "1.0.0-*",
        "Microsoft.AspNet.Diagnostics": "1.0.0-*",
        "Microsoft.Framework.Configuration.Json": "1.0.0-*",
        "Microsoft.AspNet.Authentication": "1.0.0-*"
    },

    "commands": {
        "web": "Microsoft.AspNet.Hosting --config hosting.ini"
    },

    "frameworks": {
        "dnx451": { },
        "dnxcore50": { }
    },

    "compilationOptions": {
        "allowUnsafe": true
    },

    "exclude": [
        "wwwroot",
        "node_modules",
        "bower_components"
    ],
    "publishExclude": [
        "node_modules",
        "bower_components",
        "**.xproj",
        "**.user",
        "**.vspscc"
    ]
}