Cannot find ConfigurationManager in class library

Question

So, I have a class library that I know will be used by websites and I need to access the config settings. I added a reference to System.Configuration, but I cannot find ConfigurationManager in the class library. A couple of things, one when I added a reference to the System.Configuration, it shows up as "System.configuration" with a lower case 'c', which I thought was odd. Another thing, when I access System.Configuration, the closest thing to ConfigurationManager is "ConfigurationSettings". I viewed the properties of the reference in a web app that allows me to use ConfigurationManager and this class library and they both point to the exact same file. Do I need to do this another way?

Here is a SS of my reference to it:

Answer 1

See https://msdn.microsoft.com/en-us/library/system.configuration.configurationmanager%28v=vs.100%29.aspx

It lies in System.Configuration namespace and assembly System.Configuration. Make sure you go to Framework tab in Add references and select System.Configuration