C#用流读写大文件

Code tells all：

using System;using System.IO;namespace CSharpTest{    class Program    {        static void Main(string[] args)        {            FileStream fsRead = File.OpenRead(@"D:\test\in.txt");            FileStream fsWrite = File.OpenWrite(@"D:\test\out.txt");            byte[] buf = new byte[1024 * 8];            int total = 0;            int size = 0;            do             {                //注意第二个参数是在buffer中的偏移量，不是在文件中的偏移量                size = fsRead.Read(buf, 0, buf.Length);                fsWrite.Write(buf, 0, size);                total += size;            }while (size > 0);            if (total != fsRead.Length)            {                Console.WriteLine("Error: total != fsRead.Length");            }            fsRead.Close();            fsWrite.Close();            Console.Write("GAME OVER!");            Console.ReadKey();        }    }}

相关阅读：

1、FileStream.Read 方法

2、FileStream.Write 方法

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