Uwe Keim Uwe Keim - 28 days ago 13
C# Question

Using "nameof" operator in Razor views

On my VS.NET 2015 development machine, the Razor views that use the

operator work like a charm.

When deploying to a Windows server, it fails to compile the CSHTML Razor views:


The name 'nameof' does not exist in the current context.


In German:


Der Name 'nameof' ist im aktuellen Kontext nicht vorhanden.


I've installed .NET Framework 4.6 ("ASP.NET version: 4.6.81.0") with no success.

Most likely I'm missing something plain simple.

Still, I'm really clueless. Is it a web.config setting? Or something else?

My question:

How to enable C# 6 features (like the
nameof
operator) in CSHTML Razor views?

Answer

Make sure in your file : web.config The node system.codedom exists

<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 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=\&quot;Web\&quot; /optionInfer+"/>
    </compilers>
 </system.codedom>

And you'd reference the package Microsoft.CodeDom.Providers.DotNetCompilerPlatform