类型“对象”是在未引用的程序集中定义的（NET Standard 2.0 / .NET Framework 4.6.1） [英] Type 'Object' is defined in an assembly that is not referenced (NET Standard 2.0/.NET Framework 4.6.1)

问题描述

我正在使用

不幸的是，迁移到.NET Framework导致了在所有.NET Framework Console项目中的以下错误中：

Error CS0012类型'Object'是在不是参考。您必须添加对程序集'netstandard，Version = 2.0.0.0，Culture = neutral，PublicKeyToken = cc7b13ffcd2ddd51'的引用。

其中对象可以是任何东西：枚举，任务，...

如何在不出现此类错误的情况下使用.NET Framework（4.6.1）引用.NET Standard 2.0类库？

解决方案

尝试在web.config中添加对netstandard的引用，如下所示：

 < system.web> 
< compilation debug = true targetFramework = 4.7.1> 
< assembly> 
< add assembly = netstandard，Version = 2.0.0.0，Culture = neutral，PublicKeyToken = cc7b13ffcd2ddd51 /> 
< / assembly> 
< / compilation> 
< /system.web> 
  

I'm using the .NET Standard 2.0 preview, on which my Class Libraries are based.

After having trouble with a few NuGet packages, especially regarding archive extraction, I decided to migrate my .NET Core 2.0 Console projects back to the .NET Framework 4.6.1.

The .NET Framework 4.6.1 is supposed to implement the .NET Standard 2.0 specification - according to different sources. Especially the dotnet/standard GitHub Repo.

Unfortunately, the migration to the .NET Framework resulted in the following errrors throughout all of .NET Framework Console projects:

Error CS0012 The type 'Object' is defined in an assembly that is not referenced. You must add a reference to assembly 'netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'.

Where Object can be anything: Enum, Task, ...

How would I reference .NET Standard 2.0 class libraries with .NET Framework (4.6.1) without getting such errors?

解决方案

Try to add a reference to netstandard in web.config as below:

<system.web> 
   <compilation debug="true" targetFramework="4.7.1"> 
      <assemblies> 
         <add assembly="netstandard, Version=2.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51"/> 
      </assemblies> 
    </compilation> 
</system.web>

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