c# process 输入输出

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Diagnostics;
namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Process p = new Process();
            p.StartInfo.FileName = "format.com";
            p.StartInfo.Arguments = " G: /FS:FAT /Q";
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.CreateNoWindow = true;//true表示不显示黑框，false表示显示dos界面
            p.StartInfo.UseShellExecute = false;

            p.EnableRaisingEvents = true;

            p.Exited += new EventHandler(p_Exited);
            p.OutputDataReceived += new DataReceivedEventHandler(p_OutputDataReceived);
            p.ErrorDataReceived += new DataReceivedEventHandler(p_ErrorDataReceived);

            p.Start();
            p.StandardInput.WriteLine("");
            p.StandardInput.WriteLine("");

            //开始异步读取输出
            p.BeginOutputReadLine();
            p.BeginErrorReadLine();

            //调用WaitForExit会等待Exited事件完成后再继续往下执行。
            p.WaitForExit();
            p.Close();

            Console.WriteLine("exit");

        }

        void p_OutputDataReceived(Object sender, DataReceivedEventArgs e)
        {
            //这里是正常的输出
            Console.WriteLine(e.Data);

        }

        void p_ErrorDataReceived(Object sender, DataReceivedEventArgs e)
        {
            //这里得到的是错误信息
            Console.WriteLine(e.Data);

        }

        void p_Exited(Object sender, EventArgs e)
        {
            Console.WriteLine("finish");
        }

    }
}