public static void WriteHexa(this ChecksumEncoder encoder, string hexa)
{
hexa = hexa.Replace("-", string.Empty);
byte[] bytes = Enumerable.Range(0, hexa.Length)
.Where(x => x % 2 == 0)
.Select(x => Convert.ToByte(hexa.Substring(x, 2), 16))
.ToArray();
for (int i = 0; i < bytes.Length; i++)
{
encoder.WriteByte(bytes[i]);
}
}