[MonoTouch] System.MissingMethodException: No constructor found for MonoTouch.AVFoundation.InternalAVAudioPlayerDelegate::.ctor(System.IntPtr)

[Tom Fanning]

Weird one this.

In a ViewController I call the following code in ViewDidLoad():

AudioSession.Initialize();
AudioSession.Category = AudioSessionCategory.MediaPlayback;
AudioSession.SetActive(true);

Then in response to some button presses I do:

NSError err;
var ap = AVAudioPlayer.FromUrl(new NSUrl("mysound.caf"), out err);
ap.FinishedPlaying += delegate { ap.Dispose(); };
ap.Play();

And this works great, pretty responsive etc.

Except sometimes, seemingly randomly, I get the following unhandled
exception in release mode on the device (iPhone 3GS):

System.MissingMethodException: No constructor found for
MonoTouch.AVFoundation.InternalAVAudioPlayerDelegate::.ctor(System.IntPtr)

Any ideas? Google comes up blank for that specific missing constructor.

Thanks
Tom

-- 
Tom Fanning
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