Is there a universal config file for .Net Standard 2.0 Class Library?

Question

I have a Class Library that I'm converting to a .Net Standard 2 class library in order to also use in ASP.Net Core 2.0 projects.

The library has always read from a config file items such as SMTP settings, connection strings etc.

In Web Projects it finds these values in web.config.

In Console/WinForms it finds these values in app.config.

Is there an equivalent config file for .Net Core 2.0 projects that "just works" like the previous examples?

I assume the answer is no, but looking for best way to handle this given the library is used across the organization, so maintaining backwards compatibility is important.

Answer 1

Turns out System.Configuration.ConfigurationManager was added back in .NETStandard 2.0.

Just pull it in from nuget and compile the .NETStandard 2.0 class library project.

Then, the library will work across projects using standard config files:

• Net Core 2.0 projects use app.config
• Web projects work from web.config
• Console and Windows apps work with app.config