大文件拷贝练习

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

namespace ConsoleApplication1
{
    class Program
    {
        //delegate string works(int a,int b);
        static void Main(string[] args)
        {   
 #region 大文件拷贝
            FileHelper fh = new FileHelper("c:\\error.txt", "d:\\error.txt");
            //1.定义读文件的一个流
            using (FileStream fsRead = new FileStream(fh.Source, FileMode.Open))
            {
                long totalLength = fsRead.Length;
                long readPositon = fsRead.Position;
                //2.定义一个读文件的缓存区
                byte[] buffer = new byte[1024 * 1024 * 100];//一次读10m
                //3.定义一个写文件的流
                using(FileStream fsWrite = new FileStream(fh.target,FileMode.Create))
                {
                    while (true)
                    {
                        int r = fsRead.Read(buffer, 0, buffer.Length);
                        if (r <= 0)//如果r<=0则说明读取完毕
                        {
                            break;
                        }
                        else
                        {
                            fsWrite.Write(buffer, 0, r);
                        }
                    }
                    
                }

            }
            #endregion
            Console.WriteLine("读取完毕");
          Console.Read();

        }
   }
  public class FileHelper
    {



        public string Source { get; set; }
        public string target { get; set; }
        public  FileHelper(string source,string target)
        {
            this.Source = source;
            this.target = target;
        }
    }
}