When building Fake for assembly that references a .NetCore 2.0 assembly, getting XYZ.fakes : error : Could not resolve assembly 'System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'. Are you missing an assem

Question

Hi,

When building a fake for an assembly that references a .NetCore 2.0 library, the process fails with the following error:

XYZ.fakes : error : Could not resolve assembly 'System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e'. Are you missing an assembly reference?

The unit test project is build with .Net 4.8.

I am seeing the same behavior in VS 2017, 19, and 22.

Thank you

Answer 1

Hi @WhatsaMattaU,

Welcome to Microsoft Q&A! 

Do you have the assembly 'System.Private.CoreLib’ referenced in your project?

Please ensure that the assembly version specified in your project matches the version of the assembly you are trying to reference. 

You can try to clean and rebuild the solution. You can create a new Unit Test project and verify it again. 

Sincerely,

Anna

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