class CANDataEntry
    {
        public int time { get; set; }
        public int id { get; set; }
        public int dlc { get; set; }
        public string comment { get; set; }
        public int[] bytes { get; set; }
    }

private List<CANDataEntry> data;

CANDataEntry rec = new CANDataEntry{ ... };
data.Add(rec);