mycodw

using System;
using System.IO;
using System.IO.FileStream;

namespace FileIOApplication {
   
   class Program {
      
      static void Main(string[] args) {
         FileStream F = new FileStream("test.dat", FileMode.OpenOrCreate, 
            FileAccess.ReadWrite);
         
         //for (int i = 1; i <= 20; i++) {
           // F.WriteByte((byte)i);
         //}
         int [] data=new int [2] {'A','B'};
         int z=data.length;
         for(int i=0;i<z;i++)
         {
             F.WriteByte((byte) data[i]);
             
         }
         
         F.Position = 0;
         //for (int i = 0; i <= 20; i++) {
           // Console.Write(F.ReadByte() + " ");
         //}
         int data1=F.ReadByte();
         while(data1!=-1)
         {
             Console.Write((int)data1 + " ");
             data1=F.ReadByte();
         }
         F.Close();
         Console.ReadKey();
      }
   }
}