/// <summary>
        /// 删除用户在应用中的数据
        /// </summary>
        /// <param name="userId">用户Id</param>
        /// <param name="takeOverUserName">用于接管删除用户时不能删除的内容(例如:用户创建的专题)</param>
        /// <param name="isTakeOver">是否接管被删除用户可被接管的内容</param>
        protected override void DeleteUser(long userId, string takeOverUserName, bool isTakeOver)
        {
            TopicService topicService = new TopicService();

            topicService.DeleteUser(userId, takeOverUserName, isTakeOver);
        }
 /// <summary>
 /// 删除用户在应用中的数据
 /// </summary>
 /// <param name="userId">用户Id</param>
 /// <param name="takeOverUserName">用于接管删除用户时不能删除的内容(例如:用户创建的专题)</param>
 /// <param name="isTakeOver">是否接管被删除用户可被接管的内容</param>
 protected override void DeleteUser(long userId, string takeOverUserName, bool isTakeOver)
 {
     TopicService topicService = new TopicService();
     topicService.DeleteUser(userId, takeOverUserName, isTakeOver);
 }