/// <summary>
        /// Insert a slug
        /// </summary>
        /// <param name="slug">Slug</param>
        public void InsertSlug(Slug slug)
        {
            if (slug == null)
                throw new ArgumentNullException("slug");

            _slugRepository.Insert(slug);
        }
        /// <summary>
        /// Delete a slug
        /// </summary>
        /// <param name="slug">Slug</param>
        public void DeleteSlug(Slug slug)
        {
            if (slug == null)
                throw new ArgumentNullException("slug");

            _slugRepository.Delete(slug, true);
        }