using System.IO; 

namespace BinaryStreamApp  {      class Program      {          static void Main(string[] args)          {              //为文件打开一个二进制写入器              FileStream fs;              fs = new FileStream("C:\\BinFile.dat", FileMode.OpenOrCreate, FileAccess.ReadWrite);              BinaryWriter bw = new BinaryWriter(fs);              //准备不同类型的数据              double aDouble = 1234.56;              int aInt = 34567;              char[] aCharArray = { 'A', 'B', 'C' };              //利用Write 方法的多种重载形式写入数据              bw.Write(aDouble);              bw.Write(aInt);              bw.Write(aCharArray);              int length = Convert.ToInt32(bw.BaseStream.Length);              fs.Close();              bw.Close();              //读取并输出数据              fs = new FileStream("C:\\BinFile.dat", FileMode.OpenOrCreate, FileAccess.Read);              BinaryReader br = new BinaryReader(fs);              Console.WriteLine(br.ReadDouble().ToString());              Console.WriteLine(br.ReadInt32().ToString());              char[] data = http://www.1sucai.cn/andrew-blog/archive/2011/12/02/br.ReadChars(length);              for (int i = 0; i < data.Length; i++)              {                  Console.WriteLine("{0,7:x}",data[i]);              }              fs.Close();              br.Close();              Console.ReadLine();          }      }  }