Convert PadLeft Bit Operate

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleAppConvert
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 1; i < 10;i++ )
            {
                String str = Convert.ToString(i).PadLeft(8, '0');
                Console.WriteLine(str);
            }
            Console.WriteLine("=================================");
            byte b = 0xC1;
            if ((b>>7)!=0)
            {
                Console.WriteLine("{0} 's bit 8 is 1", Convert.ToString(b, 2).PadLeft(8, '0'));
            } 
            else
            {
                Console.WriteLine("{0} 's bit 8 is 0", Convert.ToString(b, 2).PadLeft(8, '0'));
            }

            b = 0x41;
            if ((b >> 7) != 0)
            {
                Console.WriteLine("{0} 's bit 8 is 1", Convert.ToString(b, 2).PadLeft(8, '0'));
            }
            else
            {
                Console.WriteLine("{0} 's bit 8 is 0", Convert.ToString(b, 2).PadLeft(8, '0'));
            }
/*
11000001 's bit 8 is 1
01000001 's bit 8 is 0           
*/
            ///////////////////////////////////////
        }
    }
}
/*
00000001
00000002
00000003
00000004
00000005
00000006
00000007
00000008
00000009
请按任意键继续. . . 
 */