c# 解压ZIP压缩包到指定的目录下

        /// <summary>
        /// 解压ZIP压缩包到指定的目录下
        /// </summary>
        /// <param name="fileToUnZip"></param>
        /// <param name="zipedFolder"></param>
        /// <param name="password"></param>
        /// <returns></returns>
        private bool UnZip(string fileToUnZip, string zipedFolder, string password = null)
        {
            bool result = true;
            FileStream fs = null;
            ZipInputStream zipStream = null;
            ZipEntry ent = null;
            string fileName;

            if (!File.Exists(fileToUnZip)) return false;
            if (!Directory.Exists(zipedFolder)) Directory.CreateDirectory(zipedFolder);

            try
            {
                zipStream = new ZipInputStream(File.OpenRead(fileToUnZip.Trim()));
                if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
                while ((ent = zipStream.GetNextEntry()) != null)
                {
                    if (!string.IsNullOrEmpty(ent.Name))
                    {
                        fileName = Path.Combine(zipedFolder, ent.Name);
                        fileName = fileName.Replace('/', '\\');
                        if (fileName.EndsWith("\\"))
                        {
                            Directory.CreateDirectory(fileName);
                            continue;
                        }
                        using (fs = File.Create(fileName))
                        {
                            int size = 1024 * 50;
                            byte[] data = new byte[size];
                            while (true)
                            {
                                size = zipStream.Read(data, 0, data.Length);
                                if (size > 0) fs.Write(data, 0, size);
                                else break;
                            }
                        }
                    }
                }
            }
            catch
            {
                result = false;
            }
            finally
            {
                if (fs != null)
                {
                    fs.Close();
                    fs.Dispose();
                }
                if (zipStream != null)
                {
                    zipStream.Close();
                    zipStream.Dispose();
                }
                if (ent != null)
                {
                    ent = null;
                }
                GC.Collect();
                GC.Collect(1);
            }
            return result;
        }

使用

            string str = System.Windows.Forms.Application.StartupPath + @"\NewVersions";
            if (!Directory.Exists(str)) Directory.CreateDirectory(str);

            zips = service.GetZips();
            string url = str + @"\" + zips[0];
            string DownUrl = service.GetUrl();
            bool flag = DownloadFile(DownUrl, url, this.progressBar1, label6);
            if (flag)
            {
                // 解压到 NewVersions
                if (UnZip(url, str) == false)
                {
                    MessageBox.Show("升级包解压失败.");
                    return;
                }
                // 删除 NewVersions 下的压缩包
                System.IO.File.Delete(url);
                // 更新版本信息文件
                IniClass ini = new IniClass(System.Windows.Forms.Application.StartupPath + @"\config\UpdateVersions.ini");
                ini.IniWriteValue("UpdateVersions", "version", label4.Text);
                // 启动 bat 脚本
                cmd("reboot.bat");
                // 退出当前应用程序
                Process.GetCurrentProcess().Kill();//此方法完全奏效，绝对是完全退出。
            }