SharpCompress 压缩解压

public class SharpCompressHelper
    {
        public static void UnRAR(string srcUrl,string targetUrl)
        {
            using (Stream stream = File.OpenRead(srcUrl))
            {
                var reader = ReaderFactory.Open(stream);
                while (reader.MoveToNextEntry())
                {
                    if (!reader.Entry.IsDirectory)
                    {
                        SharpCompress.Common.ExtractionOptions option = new ExtractionOptions() { Overwrite = true , ExtractFullPath =true};
                        reader.WriteEntryToDirectory(targetUrl, option);
                    }
                }
            }
        }

        /// <summary>
        /// 压缩文件夹
        /// </summary>
        /// <param name="targetFile">压缩文件夹路径</param>
        /// <param name="zipFile">压缩后路径</param>
        public  void Zips(string targetFile, string zipFile)
        {
            using (var archive = ZipArchive.Create())
            {
                ZipRecursion(targetFile, archive);
                FileStream fs_scratchPath = new FileStream(zipFile, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
                byte[] bytes = new byte[fs_scratchPath.Length];
                fs_scratchPath.Read(bytes, 0, bytes.Length);
                fs_scratchPath.Close();
                MemoryStream ms = new MemoryStream(bytes);
                archive.SaveTo(ms, CompressionType.GZip);
                fs_scratchPath.Close();
                fs_scratchPath.Dispose();
            }
        }
        /// <summary>
        /// 压缩递归
        /// </summary>
        /// <param name="fullName">压缩文件夹目录</param>
        /// <param name="archive">压缩实体</param>
        public  void ZipRecursion(string fullName, ZipArchive archive)
        {
            DirectoryInfo di = new DirectoryInfo(fullName);//获取需要压缩的文件夹信息
            foreach (var fi in di.GetDirectories())
            {
                if (Directory.Exists(fi.FullName))
                {
                    ZipRecursion(fi.FullName, archive);
                }
            }
            foreach (var f in di.GetFiles())
            {
                archive.AddEntry(f.FullName, f.OpenRead());//添加文件夹中的文件
            }
        }
    }