Piping a process

//process piping
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.IO;
using System.Windows.Forms;

namespace IndiLogiX.Propipe
{
    static class IProcessPipe
    {

        public static void ExecPro(string ProcName, string args, string WrkDir, string cmdtxt, out string coutext)
        {
            Process cmd = new Process();

            cmd.StartInfo.FileName = ProcName;
            cmd.StartInfo.Arguments = args;
            cmd.StartInfo.UseShellExecute = false;
            cmd.StartInfo.WorkingDirectory = WrkDir;
            cmd.StartInfo.CreateNoWindow = true;
            cmd.StartInfo.ErrorDialog = true;
            cmd.StartInfo.RedirectStandardOutput = true;
            cmd.StartInfo.RedirectStandardInput = true;
            cmd.StartInfo.RedirectStandardError = true;

            cmd.Start();
            StreamWriter cin = cmd.StandardInput;
            StreamReader cout = cmd.StandardOutput;

            cin.WriteLine(cmdtxt);
            cin.Close();
            coutext = cout.ReadToEnd();
            cmd.WaitForExit();
            cmd.Close();
        }

        public static string ExecPro(string ProcName, string args, string WrkDir, string cmdtxt)
        {
            Process cmd = new Process();
            string coutext;
            cmd.StartInfo.FileName = ProcName;
            cmd.StartInfo.Arguments = args;
            cmd.StartInfo.UseShellExecute = false;
            cmd.StartInfo.WorkingDirectory = WrkDir;
            cmd.StartInfo.CreateNoWindow = true;
            cmd.StartInfo.ErrorDialog = true;
            cmd.StartInfo.RedirectStandardOutput = true;
            cmd.StartInfo.RedirectStandardInput = true;
            cmd.StartInfo.RedirectStandardError = true;

            cmd.Start();
            StreamWriter cin = cmd.StandardInput;
            StreamReader cout = cmd.StandardOutput;

            cin.WriteLine(cmdtxt);
            cin.Close();
            coutext = cout.ReadToEnd();
            cmd.WaitForExit();
            cmd.Close();

            return coutext;
        }


    }
}