/// <summary>
    /// 文件夹下的文件以及子目录的文件进行压缩（多层递归）
    /// </summary>
    /// <param name="dirPath">需要压缩的文件夹路径（"C:\\data"）</param>
    /// <param name="GzipFileName">压缩后保存的路径（"C:\\data\\test.zip"）</param>
    public static void CompressDirectory(string dirPath, string GzipFileName)
    {
        //创建压缩文件
        FileStream pCompressFile = new FileStream(GzipFileName, FileMode.Create);
        using (ZipOutputStream zipoutputstream = new ZipOutputStream(pCompressFile))
        {
            Crc32 crc = new Crc32();
            Dictionary<string, DateTime> fileList = GetAllFies(dirPath);

            foreach (KeyValuePair<string, DateTime> item in fileList)
            {
                FileStream fs = new FileStream(item.Key.ToString(), FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                // FileStream fs = File.OpenRead(item.Key.ToString());
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                ZipEntry entry = new ZipEntry(item.Key.Substring(dirPath.Length));
                entry.DateTime = item.Value;
                entry.Size = fs.Length;
                fs.Close();
                crc.Reset();
                crc.Update(buffer);
                entry.Crc = crc.Value;
                zipoutputstream.PutNextEntry(entry);
                zipoutputstream.Write(buffer, 0, buffer.Length);
            }
        }
    }


    /// <summary>
    ///  获取所有文件   
    /// </summary>
    /// <param name="dir"></param>
    /// <returns></returns>
    private static Dictionary<string, DateTime> GetAllFies(string dir)
    {
        Dictionary<string, DateTime> FilesList = new Dictionary<string, DateTime>();

        if (!Directory.Exists(dir))
        {
            throw new System.IO.FileNotFoundException("目录:” +fileDire.FullName + “没有找到!");
        }

        var dirs = new DirectoryInfo[] {
            new DirectoryInfo(dir)
        };
        GetAllDirsFiles(dirs, FilesList);
        return FilesList;
    }


    /// <summary>
    ///  获取一个文件夹下的所有文件夹里的文件
    /// </summary>
    /// <param name="dirs"></param>
    /// <param name="filesList"></param>
    private static void GetAllDirsFiles(DirectoryInfo[] dirs, Dictionary<string, DateTime> filesList)
    {
        foreach (DirectoryInfo dir in dirs)
        {
            foreach (FileInfo file in dir.GetFiles("."))
            {
                filesList.Add(file.FullName, file.LastWriteTime);
            }
            GetAllDirsFiles(dir.GetDirectories(), filesList);
        }
    }

直接调用CompressDirectory方法即可