udp数据解析中取byte中某一位的值

byte[] bt = new byte[] { 0xA0, 0x13, 0x77, 0x8A, 0xD5, 0x30, 0x00, 0xE2, 0x88, 0x68, 0x94, 0x00, 0x00, 0x40, 0x0F, 0x43, 0x93, 0x95, 0xC3, 0x45 };

byte a = (byte)((bt[4] >> 0) & 0x01);//低位最后一位的值
byte b = (byte)((bt[4] >> 1) & 0x01);//低位倒数第二位
Console.WriteLine("得到的数{0},{1}", a, b);
Console.Read();