title: AVAudioplayer initialize component throws a null exception
body: <pre><code>string mediafile;
  mediafile=Constants.AudioLink;
  NSUrl url1=new NSUrl(mediafile);
  var audioplayer=AVAudioPlayer.FromUrl(url1);
  </code></pre>
  
  <p>URL is getting link correctly but audio player getting value null. It throws an exception below:</p>
  
  <pre><code>Could not initialize an instance of the type 'AVFoundation.AVAudioPlayer': the native 'initWithContentsOfURL:error:' method returned nil.
  </code></pre>
  
  <p>It is possible to ignore this condition by setting : <code>MonoTouch.ObjCRuntime.Class.ThrowOnInitFailure to false</code></p>
  
  <p>What can i do, Please give me the solution.</p>