Reading keys from app.config

Question

Reading keys from app.config is not working

I have 4 layers in my solution:

Business Layer
Data Access Layer
Presentation Layer
Shared Layer

I added this app.config file in the shared layer:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <appSettings>
    <add key="TEST" value="ItsWorking" />
  </appSettings>
</configuration>

and I included the System.Configuration dll in references

I tried

var value = ConfigurationManager.AppSettings["TEST"];

but it returns null

You can check this question: http://stackoverflow.com/a/12892083/2889347 — Federico Navarrete, Apr 09 '17 at 17:25
`ConfigurationManager.AppSettings` will read the `.config` file of the *current* executing assembly. If the code is running inside a web application (e.g. ASP.NET MVC or Web API) than your `appSettings` tag should be added to the root `Web.config`. — Federico Dipuma, Apr 09 '17 at 17:44
@FedericoDipuma Move your comment to answers so i can mark it as correct answer. — Shalto, May 14 '17 at 15:52

score 1 · Answer 1 · answered Apr 09 '17 at 18:48

The configuration only reads from the executing project assembly so you only need in the executable project and you can access from all your others projects.

Maybe you can use a configurationProvider with an Interface and with IOC you can access from all your projects.

Like

public interface IConfigurations
{
  string TEST {get;}
}

You use this interfaces in all your projects and only where you implement the properly configurations you implement the interface for a app.config, xml, .text, DB, or any source.

  public class Configurations : IConfigurations
    {
      public string TEST => ConfigurationManager.AppSettings["TEST"]; 
    }

Reading keys from app.config

1 Answers1