using System;

public class Program

{

    private static  int[] data;

    private static  bool GetBit(int pos)

    {

        var arrayOffset = 0;

        var innerOffset = pos;

        if (pos < 32) return ((data[arrayOffset] >> innerOffset) & 0x01) == 0x01;

        arrayOffset = (int) Math.Floor(pos / 32.0f);

        innerOffset = pos - (arrayOffset * 32);

        return ((data[arrayOffset] >> innerOffset) & 0x01) == 0x01;

    }

​

    private static  void SetBit(int pos, bool value)

    {

        var arrayOffset = 0;

        var innerOffset = pos;

        if (pos >= 32)

        {

            arrayOffset = (int) Math.Floor(pos / 32.0f);

            innerOffset = pos - (arrayOffset * 32);

        }

        if(value)

        {

            // set the bit

            data[arrayOffset] |= (0x01 << innerOffset);

        }

        else

        {

            // clear the bit

            data[arrayOffset] &= ~(0x01 << innerOffset);

        }

    }

​

    private static byte GetByte(int pos)

    {

        var value = 0;

        for (int i = 0; i < 7; i++)

        {

            value |= (GetBit(pos + i) ? 1 : 0) << i;

        }

        return (byte) value;

    }

​

    private static void SetByte(int pos, byte val)

    {

        for (int i = 0; i < 7; i++)

        {

            SetBit(pos + i, ((val >> i) & 0x01) == 1);

        }

    }

    public static void Main()

    {

        Console.WriteLine("Hello World");

        data = new int[] {0, 0, 0};

        SetByte(2, 255);

        Console.WriteLine(GetByte(2));

    }

}