title: How to create custom config section in app.config?
body: <p>I want to add a custom configuration section in my <code>app.config</code> file.
  Is there a way to do it and how can I access these settings in my program.
  Following is the config section I want to add to my <code>app.config</code>:</p>
  
  <pre><code>&lt;RegisterCompanies&gt;
      &lt;Companies&gt;
        &lt;Company name="Tata Motors" code="Tata"/&gt;
        &lt;Company name="Honda Motors" code="Honda"/&gt;
      &lt;/Companies&gt;
  &lt;/RegisterCompanies&gt;
  </code></pre>