title: Is Web.config or App.config keys are case insensitive?
body: <p>I am accessing the key from App.config in the class. If I give the key irrespective of case I am able to access its value.</p>
  
  <p>I have checked that I am not doing ToLower() anywhere.</p>
  
  <pre><code>//The below is the key in App.config
  &lt;add key="Timezone_Minutes" value="+100"/&gt;
  
  //Accessing this key in class
   private static readonly string timezoneMinutes = ConfigurationSettings.AppSettings["TIMEZONE_MINUTES"];
  </code></pre>
  
  <p>I am getting the value +100 in timezoneMinutes. The key given in App.config is Timezone_Minutes, but accessing in class is TIMEZONE_MINUTES. But still I get the value. Is it case insensitive. I googled, but didn't get the proper answer.</p>