protected IDisposable BeginStoryboard()
{
if (_currentStoryboardDisposable != null)
throw new InvalidOperationException("You cannot call BeginStoryboard without running the storyboard you began with a previous call.");
_currentStoryboardDisposable = new StoryboardDisposable(new Storyboard());
_currentStoryboardDisposable.Disposed += CleanupStoryboardDisposable;
return _currentStoryboardDisposable;
}
private void CleanupStoryboardDisposable()
{
_currentStoryboardDisposable = null;
}
