validate.cs

private static void ValidateGoogleSchedule(List<GoogleRouteSchedule> routeSchedules)
{
    foreach (GoogleRouteSchedule routeSchedule in routeSchedules)
    {
        foreach (GoogleDaySchedule routeDaySchedule in routeSchedule.Days)
        {
            var stopSchedules = routeDaySchedule.StopSchedules;
            var pairs = stopSchedules.Take(stopSchedules.Count - 1).Zip(stopSchedules.Skip(1), (fst, snd) => (fst, snd));
            foreach (var (fst, snd) in pairs)
            {
                Debug.Assert(fst.Times.Count == snd.Times.Count);
                for (var i = 0; i < fst.Times.Count; i++)
                {
                    if (fst.Times[0] > snd.Times[0])
                    {
                        Console.WriteLine($"Time travel violation for {routeSchedule.RouteNo}. {fst.Name} at {fst.Times[i]} occurs after and {snd.Name} at {snd.Times[i]}");
                    }
                }
            }
        }
    }
}