public static class TxxTool
    {
        #region 读取文件大小

        private static List<string> DirList = new List<string>();

        public static long GetFileSize(string path)
        {
            DirList = new List<string>();
            DirList.Add(path);
            GetAllDirecotries(path);

            long fileSize = 0;
            foreach (var itemPath in DirList)
            {
                fileSize += GetDirectoriesSize(itemPath);
            }

            return fileSize;
        }

        private static void GetAllDirecotries(string dirPath)
        {
            if (Directory.Exists(dirPath) == false)
            {
                return;
            }

            DirectoryInfo[] dirArray = new DirectoryInfo(dirPath).GetDirectories();
            foreach (DirectoryInfo item in dirArray)
            {
                DirList.Add(item.FullName);
                GetAllDirecotries(item.FullName);
            }
        }

        private static long GetDirectoriesSize(string dirPath)
        {
            if (Directory.Exists(dirPath) == false)
            {
                return 0;
            }

            long size = 0;
            DirectoryInfo dir = new DirectoryInfo(dirPath);
            foreach (FileInfo info in dir.GetFiles())
            {
                size += info.Length;
            }

            DirectoryInfo[] dirBotton = dir.GetDirectories();
            foreach (DirectoryInfo info in dirBotton)
            {
                size += GetDirectoriesSize(info.FullName);
            }

            return size;
        }

        public static string GetFormatSizeString(int size)
        {
            string[] ns = new string[] { "Byte", "KB", "MB", "GB", "TB", "PB" };
            double baseNum = 1024;
            if (size <= 0)
            {
                return $"{0.ToString("F2")} {ns[0]}";
            }

            int pow = Math.Min((int)Math.Floor(Math.Log(size, baseNum)), ns.Length - 1);

            return $"{(size / Math.Pow(baseNum, pow)).ToString("F2")} {ns[pow]}";
        }

        #endregion
    }