byte[] bytes = BitConverter.GetBytes(0xb);
            foreach(byte b in bytes)
            {
                Console.Write(Convert.ToString(b,2));
                //1011,0000,0000,0000
            }

------解决方案--------------------
好不容易坐个SF,fuck 还发错了.哈哈

Response.Write(Convert.ToString(Convert.ToInt32("B", 16), 2).PadRight(8, '0'));

------解决方案--------------------
C# code
0x0B = 0000 1011

ASCII "B" = 0x42 = 0100 0010

------解决方案--------------------
十六进制B

1011
只有8位