title: What is the function of the LockItem attribute in appSettings in App.Config file?
body: <pre><code>&lt;add key="MaxAllowed" value="90" lockItem="false"/&gt;
  </code></pre>
  
  <p>There is a item called lockItem in my config file? 
  MSDN states that "Gets or sets a value indicating whether the element is locked."</p>
  
  <p>What does this mean? Does it mean that if set to true, the configuration won't be changed by editing the config file? </p>