title: ConfigurationManager.AppSettings use another config file
body: <p>I have about 10 methods in my class. In every method I use <code>ConfigurationManager.AppSettings</code> to get value form App.config file </p>
  
  <p>like </p>
  
  <pre><code> _applicationPort = int.Parse(ConfigurationManager.AppSettings["ApplicationPort"]
  </code></pre>
  
  <p>My problem is that I want to make this code get AppSettings from another app.config file like AnotherPoject.exe.config.</p>