using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        new int[] 

        {

            0,0,1,1,1,1,0,0,

            0,1,0,0,0,0,1,0,

            1,0,1,0,0,1,0,0,

            1,0,0,0,0,0,0,1,

            1,0,1,0,0,1,0,0,

            1,0,0,1,1,0,0,0,

            0,1,0,0,0,0,1,0,

            0,0,1,1,1,1,0,0,

        }

        .Select((pixel, index) => (pixel, index)) //pixel value with index

        .GroupBy(pixelWithIndex => pixelWithIndex.index / 8) // group by integer divison by 8

        .Select(g => (byte)g.Sum( // sum of 

        pixelWithIndex => CheckPixel(pixelWithIndex.pixel) * Math.Pow(2, (pixelWithIndex.index % 8)) //

        ))

        .Dump(); //dump on console

    }

​

    static int CheckPixel(int pixel)

    {

        return pixel == 0 ? 0 : 1;

    }

}

​