public override void ViewWillTransitionToSize(CGSize toSize, IUIViewControllerTransitionCoordinator coordinator)
{
base.ViewWillTransitionToSize(toSize, coordinator);
//update capture session with new interface orientation
_captureSession.UpdateVideoOrientation(
GetCaptureVideoOrientation(UIApplication.SharedApplication.StatusBarOrientation));
coordinator.AnimateAlongsideTransition(context => { UpdateContentInset(); },
context => { UpdateItemSize(); });
}