/// <summary>
        /// 人类可识别的文件大小显示格式
        /// </summary>
        /// <param name="size">文件大小(Byte为单位)</param>
        /// <returns></returns>
        public static string HumanReadableFileSize(double size)
        {
            string[] units = new string[] { "B", "KB", "MB", "GB", "TB", "PB" };
            double mod = 1024.0;
            int i = 0;
            while (size >= mod)
            {
                size /= mod;
                i++;
            }

            //四舍六入
            //return Math.Round(size) + units[i];

            //取小数点后一位
            return size.ToString("0.0");
        }