笔记

byte[] a = new byte[] { 0x0A, 0x0C, 0x2f, 0x8a };
byte[] bya = new byte[4];
Buffer.BlockCopy(a, 0, bya, 0, 3);
bya[3] = 0x00;
string hex = Convert.ToString(BitConverter.ToInt32(bya, 0), 16);

hex=>2f0c0a