using System;

using System.Linq;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        var list = new[]{1, 2, 3}.Select(x=>new Number(x));

        Number.Pad = 32;

        Console.WriteLine(string.Join("\n", list.Select(x=> string.Format("Number: {0}\n\tLittle Endian Form:\t {1}\n\tBig Endian Form:\t\t{2}\n\tWhich looks like:\t   {3}", x.Num, Number.BinaryFormat(x.LittleEndian), Number.BinaryFormat(x.BigEndian), Convert.ToInt64(x.BigEndian, 2)))));

        //Console.WriteLine(string.Join("\n", list.Select(x=> string.Format("{0}: {1}", x.Num, Convert.ToInt64(x.LittleEndian, 2)))));

    }

}

​

public class Number{

    static Func<int, string> toBinary = new Func<int, string>(x=>Convert.ToString(x,2).PadLeft(Pad, '0'));

    public static int Pad {get;set;}

    public Number(int i){

        Num = i;

    }

    public int Num{get;set;}

    public string LittleEndian{get{return toBinary(Num);}}

    public string BigEndian{get{return littleEndian();}}

    string littleEndian(){

        char[][] bits = new char[Pad/8][];

        for(int i=0;i<bits.Count();i++){

            bits[i] = new char[8];

        }

        for(var i=0;i<LittleEndian.Count();i++){

            bits[i/8][i%8] = LittleEndian[i];

        }

        return string.Concat(bits.Reverse().SelectMany(x=>x));

    }

    public static string BinaryFormat(string orig){

        var sb = new StringBuilder();

        for(var i=0;i<orig.Count();i++){

            if(i%8==0){

                sb.Append(' ');

            }

            sb.Append(orig[i]);

        }

        return sb.ToString().Trim();

    }

}