Binary Read-Write (Exercise)

using System;
using System.IO;

namespace ConsoleTests
{
    class ConsoleTests
    {
        static void Main()
        {
        W();
            R();
            Console.WriteLine();
        }

        static void W()
        {
            int[] a = new int[]
            {
                1,
                4,
                6,
                7,
                   11,
                   55,
                  777,
                   23,
                  266,
                   44,
                   82,
                   93
            };

            using (BinaryWriter b = new BinaryWriter(File.Open("file.bin", FileMode.Create)))
            {
                foreach (int i in a)
                {
               b.Write(i);
                }
            }
        }

        static void R()
        {
            using (BinaryReader b = new BinaryReader(File.Open("file.bin", FileMode.Open)))
            {
                int pos = 0;
                int length = (int)b.BaseStream.Length;
                while (pos < length)
                {
                    int v = b.ReadInt32();
                    Console.Write(v + " ");

                    pos += sizeof(int);
                }
            }
        }

    }
}