/// <summary>
        /// Deletes list by given id
        /// </summary>
        /// <param name="listId">list id</param>
        public void DeleteList(Guid listId)
        {
            ListsManager listsManager = ListsManager.GetManager();

            List list = listsManager.GetLists().Where(l => l.Id == listId).FirstOrDefault();

            if (list != null)
            {
                listsManager.DeleteList(list);

                listsManager.SaveChanges();
            }
        }