public static class RARHelper
    {
        public static bool ExistsWinRar()
        {
            bool result = false;

            string key = @"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\WinRAR.exe";
            RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(key);
            if (registryKey != null)
            {
                // result = registryKey.GetValue("").ToString();
                result = true;
            }
            registryKey.Close();

            return result;
        }

        // <summary>
        /// 将格式为rar的压缩文件解压到指定的目录
        /// </summary>
        /// <param name="rarFileName">要解压rar文件的路径</param>
        /// <param name="saveDir">解压后要保存到的目录</param>
        public static void DeCompressRar(string sourceFilePath, string destinationPath)
        {
            try
            {
                string key = @"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\WinRAR.exe";
                RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(key);
                var rarexe = registryKey.GetValue("").ToString();
                registryKey.Close();
                var shellArguments = string.Format("x -o+ \"{0}\" \"{1}\\\"", sourceFilePath, destinationPath);
                using (Process unrar = new Process())
                {
                    ProcessStartInfo startinfo = new ProcessStartInfo();
                    startinfo.FileName = rarexe;
                    startinfo.Arguments = shellArguments;               //设置命令参数
                    startinfo.WindowStyle = ProcessWindowStyle.Hidden;  //隐藏 WinRAR 窗口
                    unrar.StartInfo = startinfo;
                    unrar.Start();
                    unrar.WaitForExit();//等待解压完成
                    unrar.Close();
                }

            }
            catch (System.Exception ex)
            {

            }
        }
        /// <summary>
        /// 将目录和文件压缩为rar格式并保存到指定的目录
        /// </summary>
        /// <param name="soruceDir">要压缩的文件夹目录</param>
        /// <param name="rarFileName">压缩后的rar保存路径</param>
        public static void CompressRar(string soruceDir, string rarFileName)
        {
            try
            {
                string key = @"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\WinRAR.exe";
                RegistryKey registryKey = Registry.LocalMachine.OpenSubKey(key);
                var rarexe = registryKey.GetValue("").ToString();
                registryKey.Close();
                var shellArguments = string.Format("a -ep1 \"{0}\" \"{1}\" -r", rarFileName, soruceDir);
                using (Process unrar = new Process())
                {
                    ProcessStartInfo startinfo = new ProcessStartInfo();
                    startinfo.FileName = rarexe;
                    startinfo.Arguments = shellArguments;               //设置命令参数
                    startinfo.WindowStyle = ProcessWindowStyle.Hidden;  //隐藏 WinRAR 窗口
                    unrar.StartInfo = startinfo;
                    unrar.Start();
                    unrar.WaitForExit();//等待解压完成
                    unrar.Close();
                }

            }
            catch (System.Exception ex)
            {

            }
        }
    }