C# 调用控制台程序，并获取输出写入文件

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

namespace CSharpIOTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string file = @"I:\computer_info.cfg";
            if (File.Exists(file))
            {
                DisplayVersion();
            
                FileStream fs = new FileStream(file, FileMode.OpenOrCreate, FileAccess.Write);
                StreamWriter sw = new StreamWriter(fs);
                sw.Write(RunCmd("systeminfo"));
                sw.Flush();
                sw.Close();
                System.Console.WriteLine("Write data successfully.\r\n");

                FileParse f = new FileParse(file);
                System.Console.WriteLine(f.FileContent);
                System.Console.WriteLine("read data successfully.\r\n");
            }            
        }

        private static string RunCmd(string cmd)
        {
            Process p = new Process();
            p.StartInfo.FileName = "cmd.exe";
            p.StartInfo.Arguments = "/c" + cmd;
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.CreateNoWindow = true;

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

            return p.StandardOutput.ReadToEnd();
        }

        private static void DisplayVersion()
        {
            System.Console.ForegroundColor = ConsoleColor.Red;
            System.Console.WriteLine("Cosmos Copyright 2010 Project");
            System.Console.WriteLine("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
            System.Console.ForegroundColor = ConsoleColor.White;
            System.Console.Write("test ");
            System.Console.ForegroundColor = ConsoleColor.Green;
            System.Console.WriteLine("2013.10.19");
            System.Console.ForegroundColor = ConsoleColor.White;
            System.Console.WriteLine();
        }
    }
}

FileParse.cs：

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

namespace CSharpIOTest
{
    class FileParse
    {
        private string filePath;//文件路径
        private string fileName;//文件名
        private string fileContent;//文件内容

        public FileParse()
        {
            filePath = string.Empty;
            fileName = string.Empty;
            fileContent = string.Empty;
        }

        public FileParse(string file)
        {
            filePath = file;
        }

        public string FilePath
        {
            set { filePath = value; }
            get { return filePath; }
        }

        public string FileName
        {
            set { fileName = value; }
            get { return fileName; }
        }

        public string FileContent
        {
            set { fileContent = value; }
            get 
            {
                if (File.Exists(filePath))
                {
                    FileStream fs = new FileStream(filePath,FileMode.Open,FileAccess.Read);
                    StreamReader sr = new StreamReader(fs);
                    return sr.ReadToEnd();
                }
                else
                {
                    System.Console.WriteLine("file is empty.\r\n");
                    return string.Empty;
                }
            }
        }
    }
}