C#

class Program
{
    static int RecordTime; // cksum variable

    static int time(object obj)
    {
        //your time method I just filled it to see the code is working or not!
        return Environment.TickCount;
    }

   static void Main(string[] args)
    {
        int linecounter = 4;
        byte parity = 0;       // cksum variable
        byte checksum = 0;     // cksum variable

        byte[] beef = new byte[8];

        RecordTime = time(null);
        beef[0x0] = (byte)(RecordTime / (256 * 256 * 256));
        beef[0x1] = (byte)(RecordTime / (256 * 256));
        beef[0x2] = (byte)(RecordTime / 256);
        beef[0x3] = (byte)(RecordTime % 256);
        beef[0x4] = (byte)(linecounter % 256);
        for (int i = 0; i < 256; i++)
        {
            checksum += beef[i%8]; //changed just for preventing from index out of range Exception
            parity ^= beef[i%8];//changed just for preventing from index out of range Exception
        }
        beef[0x5] = parity;
        beef[0x6] = (byte)(checksum / 256);
        beef[0x7] = (byte)(checksum % 256);
    }
 }