Not sure if this will help anyone, but I had this issue come up when I deleted the source code from my local machine without having ever saved the solution file to TFS. (During initial development, I was right-clicking and checking in the project in Solution Explorer, but forgot to ever check in the solution itself.) When I needed to work on this again, all I had in TFS was the .csproj file, no .sln file. So in VS I did a File --> Source Control --> Advanced -- Open from Server and opened the .csproj file. From there I did a Save All and it asked me where I wanted to save the .sln file. I was saving this .sln file to the project directory with the other folders (App_Data, App_Start, etc.), not the top level directory. I finally figured out that I need to save the .sln file up a directory from the project folder so it's on the same level as the project folder. All my paths resolved and I was able to build it again.

我正在使用VS2012，遇到同样的错误。我从.csproj文件中删除了下面的Target标记，它开始编译，没有出现任何错误。

<Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
  -- Error messages within Target Tag
</Target>

我收到了这个令人沮丧的消息。最后对我有用的是删除/包内的所有文件和文件夹，让VS在下次构建时重新获取所有内容。

遇到这个问题

按以下步骤求解

清除packages文件夹中的内容(先备份) 使用“更新-包-重新安装”从包管理控制台的NuGet中重新获取和重新安装包(Tools -> NuGet包管理器->包管理控制台) 从.csproj文件中删除冗余路径。注意:NuGet会添加新的路径到csproj文件，但它不会删除旧的路径… (有一些机会csproj文件有多个路径为同一文件)

为什么我们需要“Microsoft.Net.Compilers.props”? 它将提供“\roslyn”文件夹。如果没有它，你可能仍然可以编译程序，但不能使用@{html.RenderPartial…}

在我的案例中工作的解决方案- Visual Studio 2015 enterprise，项目.NET 4.6.1

升级至Update 3 安装Web开发工具

不同的用户名是常见的原因，Nuget下载一切到:“C:\Users\USER_NAME\source\repos”，如果你之前在不同的用户名上设置了项目。csproj文件可能仍然包含旧的用户名，只需打开它，并做一个搜索替换“C:\Users\ old_user_name \source\repos”到“C:\Users\NEW_USER_NAME\source\repos”。