title: Error: Configuration system failed to initialize
body: <p>Used console application and I have a problem on the <code>app.config</code> file. By right, the code should be correct according to the various sources found in the Internet but my coding is not working for no reason. Anyone can advise me on this?</p>
  
  <p>And the <code>&lt;configuration&gt;</code> appears to be underlined with wriggly blue line, is it a warning or something? I dont know why it appears like this.</p>
  
  <p><strong>[EDITED]</strong></p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt;
  &lt;configuration&gt;
      &lt;configSetting&gt;&lt;/configSetting&gt;
      &lt;connectionStrings&gt;
          &lt;add name="Production"
               providerName="System.Data.SqlClient"
               connectionString="Data Source=EBSDLAB1SERVER2;Initial Catalog=Production;Integrated Security=True"/&gt;
      &lt;/connectionStrings&gt;
  &lt;/configuration&gt;
  </code></pre>
  
  <blockquote>
    <p>The error shows, Unhandled Exception:  System.Configuration.ConfigurationErrorException:Configuration system fail to initialize ---<br>
    System.Configuration.ConfigurationErrorException: Unrecognized configuration section connectionstring<br>
    Configuration system failed to initialize</p>
  </blockquote>