internal static void Exec(StrawberryPerl perl, string command, string path_env)
{
    Console.WriteLine("Perl-" + perl.Name + "\n==============");
 
    process = new Process();
    ProcessStartInfo startInfo = new ProcessStartInfo();
    startInfo.WindowStyle = ProcessWindowStyle.Hidden;
                                                            
    System.Environment.SetEnvironmentVariable(
        "PATH", 
        String.Join(";", perl.PerlPath, path_env)
    );

    startInfo.FileName = "cmd.exe";
    startInfo.Arguments = "/c " + perl.PerlPath + @"\" + command;
    process.StartInfo.RedirectStandardOutput = true;
    process.StartInfo.RedirectStandardError = true;
    process.StartInfo.UseShellExecute = false;
    process.Start();

    Console.WriteLine(process.StandardOutput.ReadToEnd());
    Console.WriteLine(process.StandardError.ReadToEnd());
    process.WaitForExit();
}