C#使用SharpCompress解压缩文件(.rar.zip)

 /// <summary>
 /// 压缩文件
 /// </summary>
 /// <param name="zipFileName">文件名称，如：d:\abc.zip</param>                
 /// <returns></returns>
 public bool Packing(string zipFileName)
 {
     #region 压缩zip文件

     ////解决中文文件名乱码问题
     SharpCompress.Common.ArchiveEncoding ArchiveEncoding = new SharpCompress.Common.ArchiveEncoding();
     ArchiveEncoding.Default = Encoding.GetEncoding("utf-8");
     SharpCompress.Writers.WriterOptions options = new SharpCompress.Writers.WriterOptions(CompressionType.Deflate);
     options.ArchiveEncoding = ArchiveEncoding;

     using (var writer = SharpCompress.Archives.ArchiveFactory.Create(ArchiveType.Zip))
     {
         foreach (var file in this.Files)
         {
             writer.AddEntry(Path.GetFileName(file.OriginalFileName), file.OriginalFileName);
         }
         writer.SaveTo(zipFileName, options);
     }

     #endregion

     this.PackageFileBody = File.ReadAllBytes(zipFileName);

     return true;
 }

        private void button1_Click(object sender, EventArgs e)
        {
            var fileName = @"d:\DemoFiles.rar";
            var dir = Path.Combine(Application.StartupPath, "_" + DateTime.Now.ToString("yyMMddHHmmss"));

            //创建目录
            if (!Directory.Exists(dir)) Directory.CreateDirectory(dir);
            if (!Directory.Exists(dir))
            {
                MessageBox.Show("创建解压缩目录失败！\r\n" + dir);
                return;
            }

            //
            //C#使用SharpCompress解压缩文件(.rar.zip)
            //
            //设置解压文件名称格式，防止解压后的文件名称出现乱码情况
            SharpCompress.Readers.ReaderOptions options = new SharpCompress.Readers.ReaderOptions();
            options.ArchiveEncoding.Default = Encoding.GetEncoding("utf-8");
            IArchive archive = ArchiveFactory.Open(fileName, options);
            foreach (IArchiveEntry archiveEntry in archive.Entries)
            {
                if (!archiveEntry.IsDirectory)
                {
                    archiveEntry.WriteToDirectory(dir, new ExtractionOptions
                    {
                        ExtractFullPath = true,
                        Overwrite = true,
                    });
                }
            }
        }