title: Get Media folder by name or hash in Umbraco 7
body: <p>I'm using Umbraco 7.4.</p>
  
  <p>I'd like to enumerate all files from a Media folder ("Images\Splash").</p>
  
  <p>To a custom class, I pass the reference of the UmbracoHelper instance from the controller, and can get the folder like this:</p>
  
  <pre><code>var folder = _umbraco.Media(333);
  </code></pre>
  
  <p>333 being the Id of the Media folder I want.</p>
  
  <p>How can I get this folder by it's hash, or by it's name?<br>
  I'd like to not use the Id, as this is not guaranteed to be the same between environments (dev, staging, production).</p>