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

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