// Generate file header
            byte[] header = new byte[7];
            header[0] = 0xFD;                               //Magic
            header[1] = 0x9C; header[2] = 0x00;             //Segment
            header[3] = 0x00; header[4] = 0x00;             //Offset
            header[5] = Convert.ToByte(DataSize & 0xFF);    //Low byte of DataSize
            header[6] = Convert.ToByte(DataSize >> 8);      //High byte of DataSize