configuration system failed to initialize in visual studio 2010 windows form
<p>I'm currently facing this error while running my c# program:</p>

<pre><code>  configuration system failed to initialize
</code></pre>

<p>here is my app.config file:</p>

<pre><code> &lt;?xml version="1.0" encoding="utf-8" ?&gt;
   &lt;configuration&gt;
   &lt;configSections&gt;

   &lt;add name="FastConnection"
  connectionString="DataSource=.\SQLEXPRESS;AttachDbFilename=C:\Users\mustiondb.mdf;Integrated  Security=True;Connect Timeout=30;User Instance=True" /&gt;   
   &lt;/configSections&gt;
   &lt;/configuration&gt;
</code></pre>

<p>I believe there is probably information lacking in this app.config file. However, I'm not sure what information. When I created an app config file from my windows form (visual studio 2010), the only information in the app config file was this:</p>

<pre><code>  &lt;?xml version="1.0" encoding="utf-8" ?&gt;
   &lt;configuration&gt;
   &lt;/configuration&gt;
</code></pre>

<p>I tried searching for information to add in, but i'm not sure what and where to find these information.</p>