gistfile1.cs

using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace TestGS
{
    class Program
    {
        static void Main(string[] args)
        {
            convertToPs(args[0]);
            createPdf(args[1]);
        }

        static void convertToPs(string file)
        {
            try
            {
                Process printProcess = new Process();

                printProcess.StartInfo.FileName = file;
                printProcess.StartInfo.Verb = "printto";
                printProcess.StartInfo.Arguments = "\"Ghostscript PDF\"";
                //printProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                printProcess.StartInfo.CreateNoWindow = true;
                printProcess.Start();

                // Wait until the PostScript file is created
                try
                {
                    printProcess.WaitForExit();
                }
                catch (InvalidOperationException) { }

                printProcess.Close();
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        static string createPdf(string outputPath)
        {
            try
            {
                string command = "gswin32c -q -dNOPAUSE -sDEVICE=pdfwrite " +
                  "-sOutputFile=" + outputPath + " -fe:\\GSOUTPUT.PS";

                Process pdfProcess = new Process();

                StreamWriter writer;
                StreamReader reader;

                ProcessStartInfo info = new ProcessStartInfo("cmd");
                info.WorkingDirectory = System.AppDomain.CurrentDomain.BaseDirectory;

                info.CreateNoWindow = true;
                info.UseShellExecute = false;
                info.RedirectStandardInput = true;
                info.RedirectStandardOutput = true;

                pdfProcess.StartInfo = info;
                pdfProcess.Start();

                writer = pdfProcess.StandardInput;
                reader = pdfProcess.StandardOutput;
                writer.AutoFlush = true;

                writer.WriteLine(command);

                writer.Close();

                string ret = reader.ReadToEnd();
                return ret;
            }
            catch (Exception ex)
            {
                throw ex;
            }         
        }
    }
}