/// <summary>
        /// Get group rotating image manage model
        /// </summary>
        /// <param name="id">the group id</param>
        /// <returns></returns>
        public GroupManageSettingModel GetGroupManageSettingModel(int id)
        {
            var group = GetById(id);

            if (group != null)
            {
                var model = new GroupManageSettingModel
                {
                    Id = id,
                    GroupSettingModel = SerializeUtilities.DeserializeString <GroupSettingModel>(@group.Settings)
                };
                return(model);
            }
            return(null);
        }