Could not load file or assembly 'System.Configuration.ConfigurationManager, Version=4.0.3.0 [duplicate]

问题

This question already has answers here:

Project build failed while using .net class library in .net core console application (2 answers)

.NET Core 2.1 can't reference a .NET Framework 4.7.2 Class library (1 answer)

Closed 7 days ago.

I have a .net core 3.1 console application which is using a .net framework 4.6.1 class library. I am getting the below exception when running the console application. I have added the System.Configuration.ConfigurationManager version 4.4.0 to both the projects.

System.IO.FileNotFoundException: 'Could not load file or assembly 'System.Configuration.ConfigurationManager, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find the file specified.'

I am not able to fix it, please help.

来源：https://stackoverflow.com/questions/62793231/could-not-load-file-or-assembly-system-configuration-configurationmanager-vers