using System.IO; 

namespace BinaryStreamApp 
{ 
    class Program 
    { 
        static void Main(string[] args) 
        { 
            //為文件打開一個二進制寫入器 
            FileStream fs; 
            fs = new FileStream("C://BinFile.dat", FileMode.OpenOrCreate, FileAccess.ReadWrite); 
            BinaryWriter bw = new BinaryWriter(fs); 
            //準備不同類型的數據 
            double aDouble = 1234.56; 
            int aInt = 34567; 
            char[] aCharArray = { 'A', 'B', 'C' }; 
            //利用Write 方法的多種重載形式寫入數據 
            bw.Write(aDouble); 
            bw.Write(aInt); 
            bw.Write(aCharArray); 
            int length = Convert.ToInt32(bw.BaseStream.Length); 
            fs.Close(); 
            bw.Close(); 
            //讀取并輸出數據 
            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 = //www.companysz.com/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(); 
        } 
    } 
}