using System;

using System.Globalization;

using System.Linq;

using System.Collections.Generic;

using System.Text;

​

public class Program

{

    public static void Main()

    {        

        StringBuilder str = new StringBuilder();

        byte[] x = { 0xB1, 0x53, 0x63 };

        for (int i = 0; i < 3; i++)

        {

            str.Append(Convert.ToString(x[i], 2).PadLeft(8, '0'));

        }

        Console.WriteLine(str);

        Console.ReadLine();

    }

}