C#.net 用 BinaryReader 和 BinaryWriter 读写文件

using System;
using System.IO;
using System.Text;

namespace FileTest
{
class FileTest
{
static void Main(string[] args)
{
string sourceFileName = "F://source.txt";
string targetFileName = "F://target.txt";
FileStream readFileStream = new FileStream(sourceFileName, FileMode.Open, FileAccess.Read);
FileStream writeFileStream = new FileStream(targetFileName, FileMode.Open, FileAccess.Write);
BinaryReader myBinRdr = new BinaryReader(readFileStream);
BinaryWriter myBinWtr = new BinaryWriter(writeFileStream);

try
{
File.Exists(sourceFileName); //判断源文件是否存在
}
catch(Exception e)
{
Console.WriteLine("Source File not existes ! {0}", e);
Console.ReadLine();
return;
}

try
{
byte fileContext;
myBinRdr.BaseStream.Seek(5, SeekOrigin.Begin);
myBinWtr.BaseStream.Seek(0, SeekOrigin.End);

while(myBinRdr.BaseStream.Position < myBinRdr.BaseStream.Length)
{
fileContext = myBinRdr.ReadByte(); //按照字节读取文件
myBinWtr.Write(fileContext); //写入文件
}
}
catch(EndOfStreamException e)
{
Console.WriteLine(e);
Console.ReadLine();
return;
}

myBinRdr.Close();
myBinWtr.Close();
readFileStream.Close();
writeFileStream.Close();

Console.WriteLine("Successfully !");
Console.ReadLine();

}
}
}