title: custom ConfigurationSection
body: <p>I use IConfigurationSectionHandler interface to get information about my custom config section. But it's deprecated and I want to use ConfigurationSection instead.</p>
  
  <p>How to create custom ConfigurationSection with this view and using ConfigurationSection instead IConfigurationSectionHandler:</p>
  
  <pre><code>&lt;CustomSectionBlaBla&gt;
     &lt;Parent name="DB"&gt;
         &lt;FirstChild value="someValue"/&gt;
         &lt;SecondChild value="someValue"/&gt;
     &lt;Parent/&gt;
      ...
     &lt;Parent name="UI"&gt;
         &lt;FirstChild value="someValue"/&gt;
         &lt;SecondChild value="someValue"/&gt;
     &lt;Parent/&gt;
  &lt;CustomSectionBlaBla/&gt;
  </code></pre>