/// <summary>
        /// Adds an object to the collection (must be of type SitemapItem)
        /// </summary>
        /// <param name="o">The o.</param>
        /// <returns></returns>
        public int Add(object o)
        {
            SitemapItem item = (SitemapItem)o;

            return(InnerList.Add(item));
        }
 /// <summary>
 /// Adds a SitemapItem item to the collection
 /// </summary>
 /// <param name="item">The item.</param>
 /// <returns></returns>
 public int Add(SitemapItem item)
 {
     return(InnerList.Add(item));
 }