public void Add(DateTime current, int departures, int arrivals) { if (Departures.Count > 23) { Departures.RemoveAt(0); } if (Arrivals.Count > 23) { Arrivals.RemoveAt(0); } if (Times.Count > 23) { Times.RemoveAt(0); } Departures.Add(departures); Arrivals.Add(arrivals); Times.Add($"{current.AddHours(-1d).ToString("HH")} - {current.ToString("HH\r\ndd.MM.yyyy")}"); }