/// <summary>
        /// 是否超时
        /// </summary>
        /// <returns></returns>
        public virtual bool IsTimeout()
        {
            var currentTimestamp = TimeEx.GetTimestamp();

            if (currentTimestamp - this._lastAccessTimestamp >= this._millisecondsTimeout)
            {
                return(true);
            }
            else
            {
                return(false);
            }
        }
 /// <summary>
 /// 更新访问时间戳
 /// </summary>
 public void UpdateLastAccessTimestamp()
 {
     this._lastAccessTimestamp = TimeEx.GetTimestamp();
 }