asp.net-mvc - Visual Studio 2015新建MVC项目-Microsoft.Aspnet中不存在mvc

Question

我在Visual Studio 2015中遇到错误
我使用的是Windows 8.1和Visual Studio 2013，使用asp.net MVC 5的所有项目都可以正常工作，并且开发正常，没有任何错误。

自从我安装了Windows 10和Visual Studio 2015之后，我的整个ASP.NET MVC 5项目都无法正常运行。

我在Visual Studio 2015中创建了新的默认模板来检查它们。我在那些新项目上也遇到了同样的错误。

我收到如下错误:

CS0234 The type or namespace name 'Mvc' does not exist in the namespace 'Microsoft.AspNet' (are you missing an assembly reference?)

和

The name "Layout" doesn't exist in current context.

**我已经尝试过的东西:**

修复了VS2015。

从Nuget卸载并安装了Install-Package Microsoft.AspNet.Mvc

复制本地=真

System.web.MVC已被引用。

所有地方的web.config版本5.2.3.0

Answer 1

我在％AppData％\Microsoft\VisualStudio\14.0\ActivityLog.xml中遇到此错误:

<type>Error</type>
<source>Editor or Editor Extension</source>
<description>System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---&gt; System.ArgumentException: Item has already been added. Key in dictionary: &apos;RazorSupportedRuntimeVersion&apos;  Key being added: &apos;RazorSupportedRuntimeVersion&apos;&#x000D;&#x000A;   at System.Collections.Hashtable.Insert(Object key, Object nvalue, Boolean add)&#x000D;&#x000A;   at System.Collections.Hashtable.Add(Object key, Object value)&#x000D;&#x000A;   at System.Collections.Specialized.HybridDictionary.Add(Object key, Object value)&#x000D;&#x000A;   at Microsoft.VisualStudio.Utilities.PropertyCollection.AddProperty(Object key, Object property)&#x000D;&#x000A;   at Microsoft.VisualStudio.Html.Package.Razor.RazorVersionDetector.Microsoft.Html.Editor.ContainedLanguage.Razor.Def.IRazorVersionDetector.GetVersion(ITextBuffer textBuffer)&#x000D;&#x000A;   at Microsoft.Html.Editor.ContainedLanguage.Razor.RazorUtility.TryGetRazorVersion(ITextBuffer textBuffer, Version&amp; razorVersion)&#x000D;&#x000A;   at Microsoft.Html.Editor.ContainedLanguage.Razor.RazorErrorTagger..ctor(ITextBuffer textBuffer)&#x000D;&#x000A; 

我运行了C:\“Program Files(x86)”\“Microsoft Visual Studio 14.0”\Common7\IDE\devenv.exe/resetuserdata，它已修复。

取自 Exception when opening a cshtml file