Stream in action

using System;
using System.IO;

class Program
{
    static void Main()
    {
        // Create a file called test.txt in the current directory:
        using (Stream s = new FileStream("test.txt", FileMode.Create))
        {
            Console.WriteLine(s.CanRead); // True 
            Console.WriteLine (s.CanWrite); // True 
            Console.WriteLine (s.CanSeek);  // True

            s.WriteByte(101);
            s.WriteByte(102);
            byte[] block = { 1, 2, 3, 4, 5 };
            s.Write(block, 0, block.Length);  

            Console.WriteLine(s.Length);  
            Console.WriteLine(s.Position);
            s.Position = 0; // Move back to the start

            Console.WriteLine(s.ReadByte());  
            Console.WriteLine(s.ReadByte());  

            Console.WriteLine (s.Read (block, 0, block.Length));
            Console.WriteLine (s.Read (block, 0, block.Length));
        }
    }
}