public static void MarkAsRemovedAnnotation(String bookID, String pageID)
        {
            Annotation annotation = GetAnnotation(bookID, pageID);

            if (annotation != null)
            {
                annotation.Removed     = true;
                annotation.ModifiedUtc = DateTime.UtcNow;
                AnnotationsDataAccessor.UpdateAnnotation(annotation);
            }
        }
 public static void UpdateAnnotation(Annotation annotation)
 {
     AnnotationsDataAccessor.UpdateAnnotation(annotation);
 }