C# 调用cmd.exe的方法

网上有很多用C#调用cmd的方法，大致如下：

private void ExecuteCmd(string command){Process p = new Process();p.StartInfo.FileName = "cmd.exe";p.StartInfo.UseShellExecute = false;p.StartInfo.RedirectStandardInput = true;p.StartInfo.RedirectStandardOutput = true;p.StartInfo.CreateNoWindow = true;p.Start();p.StandardInput.WriteLine(command);p.StandardInput.WriteLine("exit");p.WaitForExit();this.textBox1.Text=textBox1.Text+ p.StandardOutput.ReadToEnd();p.Close();}

上面代码有几个不足，一是必须要exit那一句，否则就会死循环。再就是每次执行Execute执行cmd后，都必须等到cmd执行完且cmd.exe进程退出，才能读到结果。有时候这样会让我们的应用程序失去操作的连续性。
事实上，通过两个线程，一个访问输入管道，一个访问输出管道，可以很容易实现持续性的效果，
下面是一个Console程序：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;using System.Diagnostics;namespace cmdtest{    class Program    {        public static string cmd_str;        public static string cmd_outstr;        public static Process p = new Process();        static void Main(string[] args)        {            p.StartInfo.FileName = "cmd.exe";            p.StartInfo.UseShellExecute = false;            p.StartInfo.RedirectStandardInput = true;            p.StartInfo.RedirectStandardOutput = true;            p.StartInfo.RedirectStandardError = true;            p.StartInfo.CreateNoWindow = true;            p.Start();            cmd_str = "";            cmd_outstr = "";            Thread t1 = new Thread(new ThreadStart(DoCmdThread));            t1.Start();            Thread t2 = new Thread(new ThreadStart(OutCmdThread));            t2.Start();            while(true)            {                cmd_str = Console.ReadLine();                Thread.Sleep(10);                if (cmd_str == "exit")                    break;            }        }        public static void DoCmdThread()        {            while (true)            {                if (cmd_str == "exit")                    break;                if (cmd_str != "")                {                    p.StandardInput.WriteLine(cmd_str);                    //p.StandardInput.WriteLine("cd");                    cmd_str = "";                }                Thread.Sleep(1);            }        }        public static void OutCmdThread()        {            while (true)            {                if (cmd_str == "exit")                {                    p.StandardInput.WriteLine("exit");                    p.WaitForExit();                    p.Close();                    break;                }                cmd_outstr = p.StandardOutput.ReadLine();                while(cmd_outstr != "")                {                    Console.WriteLine(cmd_outstr);                    cmd_outstr = p.StandardOutput.ReadLine();                }                char[] ch = new char[256];                int c = p.StandardOutput.Read(ch, 0, 256);                if (c > 0)                {                                      Console.Write(ch,0,c);                }                Thread.Sleep(1);            }        }    }}