我正在尝试运行ASP。NET MVC(模型-视图-控制器)项目从TFS (Team Foundation Server)源代码控制检索。我已经添加了所有程序集引用，我能够成功地构建和编译，没有任何错误或警告。
但是我在浏览器中得到以下错误:
找不到路径的一部分 “C: \ B8akWorkspace \ B8akProject \ B8akSolution \ B8AK.Portal \ bin \ roslyn \ csc.exe”。
以下是错误页面的完整截图。
经过几天的研究，我了解到Roslyn是一个提供高级编译特性的. net编译器平台。但是，我不明白为什么我的构建试图找到\bin\roslyn\csc.exe，因为我没有配置任何与roslyn相关的东西。我也没打算让罗斯林参与我的项目。
当前回答
默认的VS2015模板的问题是编译器实际上没有复制到tfr\bin\roslyn\目录中，而是复制到{outdir}\roslyn\目录中
在.csproj文件中添加以下代码:
<Target Name="CopyRoslynFiles" AfterTargets="AfterBuild" Condition="!$(Disable_CopyWebApplication) And '$(OutDir)' != '$(OutputPath)'">
<ItemGroup>
<RoslynFiles Include="$(CscToolPath)\*" />
</ItemGroup>
<MakeDir Directories="$(WebProjectOutputDir)\bin\roslyn" />
<Copy SourceFiles="@(RoslynFiles)" DestinationFolder="$(WebProjectOutputDir)\bin\roslyn" SkipUnchangedFiles="true" Retries="$(CopyRetryCount)" RetryDelayMilliseconds="$(CopyRetryDelayMilliseconds)" />
</Target>
其他回答
The answer for this is different for Website project and Web application Project. The underlying issue is same that NuGet package is behaving differently on different machine. It may be rights issue or some execution policy which stops it from copying to Bin folder As you know Roslyn is new compiler. you should have it in Bin folder for these Projects Go to your website NuGet Packages check this Folder Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.0 \code\packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.0 Do you see it ? Can you see code\packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.0\tools\RoslynLatest in it Now as part of compiling this Folder should get copied to your website under bin like this. \code\WebSite1\Bin\Roslyn some how that is not happening for you . Try running Visual studio as Admin . Copy Roslyn folder manually. Try uninstall and install of NuGet Package. Remember this package compile your folder and if its not there you cannot compile anything and so you cannot add anything too. Try copying this package to offline version tools -> options-> nuget package Manager->Package source-> Microsoft Visual Studio Offline Packages C:\Program Files (x86)\Microsoft SDKs\NuGetPackages
我在Microsoft.CodeDom.Providers.DotNetCompilerPlatform 1.06上有这个错误，但在@ prisoner erzero上也有1.0.7的错误。然而，当微软发布1.0.8 2017-10-18时，它终于开始为我工作了，我不必降级。
https://www.nuget.org/packages/Microsoft.CodeDom.Providers.DotNetCompilerPlatform/
您的构建正在试图找到\bin\roslyn\csc.exe，因为以下包已添加到您的项目中。检查一下你的套餐。配置文件，你可以把它们都放在那里
Microsoft.CodeDom.Providers.DotNetCompilerPlatform
Microsoft.Net.Compilers
What is Roslyn and Who added them(packages) in the project : If you’re using .net Framework 4.5.2 to create projects using VS2015, you might have noticed that the project templates use Roslyn by default. Actually, Roslyn is one of open-source compilers for .NET languages from Microsoft. Why should we delete Roslyn : If your project has Roslyn references and you are interested to deploy it on server, you will get unwanted errors on the website as many hosting providers still have not upgraded their servers and hence do not support Roslyn. To resolve this issue, you will need to remove the Roslyn compiler from the project template.
如果你不想利用罗斯林 按照下面的步骤删除它
1. 删除NuGet包，从NuGet包控制台使用以下命令
PM> Uninstall-package Microsoft.CodeDom.Providers.DotNetCompilerPlatform
PM> Uninstall-package Microsoft.Net.Compilers
2. 在你完成这些之后，你的网。配置文件应该自动更新。如果不是，请在web中查找下面的代码。配置文件，如果找到，删除这段代码。
<system.codedom>
<compilers>
<compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:6 /nowarn:1659;1699;1701"></compiler>
<compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:14 /nowarn:41008 /define:_MYTYPE=\"Web\" /optionInfer+"></compiler>
</compilers>
</system.codedom>
下面为我解决了这个问题:
更新到Visual Studio 2017的最新版本(使用安装程序应用程序) 清理并重新构建解决方案
在我的情况下，我们的团队不想保留“包”文件夹，所以我们把所有的dll放在其他目录，如“sharedlib”。
我使用构建事件来解决这个问题。
if "$(ConfigurationName)" == "Release" (
goto :release
) else (
goto:exit
)
:release
if not exist $(TargetDir)\roslyn mkdir $(TargetDir)\roslyn
copy /Y "$(ProjectDir)..\..\Shared Lib\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.2.0.1\tools\Roslyn45\*" "$(TargetDir)\roslyn"
goto :exit
:exit
