CRC-16

using System;

public class Program
{
    public static void Main()
    {
        Console.WriteLine("Hello World");

        byte[] arr = new byte[2];
        arr[0] = 0;
        arr[1] = 0xC4;

        Console.WriteLine("crc: "+Compute_CRC16_Simple(arr));
    }

    public static ushort Compute_CRC16_Simple(byte[] bytes)
{
    const ushort generator = 0x8005;    /* divisor is 16bit */
    ushort crc = 0; /* CRC value is 16bit */

    foreach (byte b in bytes)
    {
        crc ^= (ushort)(b << 8); /* move byte into MSB of 16bit CRC */

        for (int i = 0; i < 8; i++)
        {
            if ((crc & 0x8000) != 0) /* test for MSB = bit 15 */
            {
                crc = (ushort)((crc << 1) ^ generator);
            }
            else
            {
                crc <<= 1;
            }
            Convert.ToString(5, 2);
            Console.WriteLine("crc: "+Convert.ToString(crc, 2));
        }
    }

    return crc;
}

}