using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public class RunStop

    {

        public int? Seq;

        public DateTime StopTime;

        public int RunStopId;

        public string Name;

        public override string ToString()

        {

            return $"{Seq}|{StopTime}|{RunStopId}|{Name}";  

        }

    }

    public static void Main()

    {

        Console.WriteLine("Hello World");

        List<RunStop> runStops = new List<RunStop>();

        runStops.Add(new RunStop() 

                     { 

                         Seq = 1, 

                         StopTime = DateTime.Parse("1970-01-01 08:32:00.000"), 

                         RunStopId = 27883, 

                         Name = "ROSE LN & SMILEY AV" 

                     });

        runStops.Add(new RunStop() 

                     { 

                         Seq = 2, //set to null to confirm

                         StopTime = DateTime.Parse("1970-01-01 08:33:00.000"), 

                         RunStopId = 27883, 

                         Name = "ROSE LN & CLOVERDALE AV" 

                     });

        runStops.Add(new RunStop() 

                     { 

                         Seq = 500, 

                         StopTime = DateTime.Parse("1900-01-01 08:55:00.000"), 

                         RunStopId = -1002, 

                         Name = "LOCATION" 

                     });

        IEnumerable<RunStop> newOrder = new List<RunStop>();

        if (runStops.All(s => s.Seq.HasValue))

            newOrder = runStops.OrderBy(s => s.Seq)

                                .ThenBy(s => s.StopTime.TimeOfDay)

                                .ThenBy(s => s.RunStopId);

        else

            newOrder = runStops.OrderBy(s => s.StopTime.TimeOfDay)

                                .ThenBy(s => s.Seq)

                                .ThenBy(s => s.RunStopId);

        foreach(var stop in newOrder)

        {

            Console.WriteLine(stop.ToString());

        }

    }

}