byte[] vals = { 0x01, 0xAA, 0xB1, 0xDC, 0x10, 0xDD }; string str = BitConverter.ToString(vals); Console.WriteLine(str); str = BitConverter.ToString(vals).Replace("-", ""); Console.WriteLine(str); /*Output: 01-AA-B1-DC-10-DD 01AAB1DC10DD */