c#读写文件小结（读写文件）

 static void Main(string[] args)         {        

     FileStream fs3 = File.Open("c://test.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.Read);    

   //创建文件流对象       

     string text = "nihao";            

    byte[] data = Encoding.Default.GetBytes(text);

   //转换成byte数组

    fs3.Write(data, 0, data.Length);         

    fs3.Flush();          

    byte[] buffered = new byte[1024];           

    int count;           

    string s = "";           

    fs3.Seek(0,SeekOrigin.Begin);      

  //  这是关键因为在写的过程中指针已发生改变

//回到起始位置

    while ((count=fs3.Read(buffered,0,1024))!=0)           

   {              

           s = s + Encoding.UTF8.GetString(buffered, 0, count);        

  }           

  Console.WriteLine(s);         

   Console.ReadKey();

 }