public void AddFrameCommandExecute(object obj)
        {
            //Code To Create new Frame
            Frame f = _canvasHost.animation.addCopyOfFrame(_canvasHost.currentFrame);

            _frames.Add(f);
            //Move to Frame
            _canvasHost.moveToFrame(_canvasHost.animation.numFrames() - 1);
            //Update View
            ICollectionView view = CollectionViewSource.GetDefaultView(Frames);

            view.Refresh();
            view.MoveCurrentToFirst();
        }