C#命令列重新導向

private static string CreatePdf(string fileName){    string command = "gswin32c -q -dNOPAUSE -sDEVICE=pdfwrite -sOutputFile=\"" + fileName + ".pdf\"  -fc:\\output.ps";    Console.WriteLine(command);    Process p = new Process();    StreamWriter sw;    StreamReader sr;                ProcessStartInfo info = new ProcessStartInfo("cmd");    info.WorkingDirectory = System.AppDomain.CurrentDomain.BaseDirectory;    Console.WriteLine("Current directory: " + info.WorkingDirectory);    info.CreateNoWindow = true;    info.UseShellExecute = false;                info.RedirectStandardInput = true;    info.RedirectStandardOutput = true;                p.StartInfo = info;    p.Start();                sw = p.StandardInput;    sr = p.StandardOutput;    sw.AutoFlush = true;                sw.WriteLine(command);                sw.Close();                string ret = sr.ReadToEnd();    Console.WriteLine(ret);    return ret;}

from:http://www.codeproject.com/Articles/17574/Programmatically-Convert-Documents-to-PDFs-the-Eas