Access app.config file in class library from web project

Question

I have a class (myservice) in a wcf class library which accesses endpoints and appsettings from the app.config file in the class library. This class (myservice) is called from my controller (web project). I find it's trying to read the web.config file for the web project and not the app.config file. How would I access the correct file?

Besides not getting any values, I'm getting this error

exePath must be specified when not running inside a stand alone exe

I'm using this in myservice-

var appSettings = ConfigurationManager.AppSettings;

var configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal);
var serviceModelSectionGroup = ServiceModelSectionGroup.GetSectionGroup(configuration);
var clientSection = serviceModelSectionGroup.Client;
var endpoint = clientSection.Endpoints;
return new EndpointAddress(endpoint[0].Address);

Answer 1

You should not use ConfigurationManager.OpenExeConfiguration in your library. The recommended way is to have your configuration passed from the using code; if for some reasons you don't want to do that, you can use Settings mechanism that creates configuration sections without having you directly access the configuration file.

Answer 2

The problem is with the line

 var configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.PerUserRoamingAndLocal);

There is an overload for this call available

ConfigurationManager.OpenExeConfiguration(string exepath)