[code=csharp]public static bool StartUnRAR(string rarFile, string destinationDirectory, bool deleteRarFile)

        {

            RegistryKey regkey;

            Object regvalue;

            string cmd;

            ProcessStartInfo startinfo;

            Process process;

            string rarexe;

            try

            {

                // 如果不输入目录则释放到与压缩包同目录下

                if (destinationDirectory == null)

                {

                    destinationDirectory = Path.GetDirectoryName(rarFile);

                }







                regkey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\WinRAR.exe");

                regvalue = regkey.GetValue("");

                rarexe = regvalue.ToString();

                regkey.Close();

               // rarexe = rarexe.Substring(1, rarexe.Length - 7);//解压缩命令，相当于在要压缩文件(rarName)上点右键->WinRAR->解压到当前文件夹

                cmd = string.Format("x {0} {1} -y",

                                    rarFile,

                                    destinationDirectory);

                startinfo = new ProcessStartInfo();

                startinfo.FileName = rarexe;

                startinfo.Arguments = cmd;

                startinfo.WindowStyle = ProcessWindowStyle.Hidden;

                process = new Process();

        &