private void UnregisterRadBookItemHandlers(RadBookItem[] radBookItems)
{
if (radBookItems == null)
{
throw new ArgumentException("radBookItems");
}
foreach (RadBookItem item in radBookItems)
{
KinectRegion.RemoveHandPointerEnterHandler(item, OnHandPointerEnterPage);
KinectRegion.RemoveHandPointerLeaveHandler(item, OnHandPointLeavePageRegion);
}
}