using System;

using System.Linq;

using System.Collections.Generic;

​

using Cronos;

public class Program

{

    public static void Main()

    {

        DateTime vLastRun = DateTime.SpecifyKind(new DateTime(2023, 8 , 9,        8, 59, 0), DateTimeKind.Utc);

        string vLastRunString = vLastRun.ToString("yyyy-MM-dd HH:mm:ss");

        bool vMissedRun = false;

        CronExpression vCron = CronExpression.Parse("0 * * * * ?", CronFormat.IncludeSeconds);

        // - - -

        DateTime? vLastRunTime = vCron.GetNextOccurrence(vLastRun, false);

        DateTime? vNewRunTime = vCron.GetNextOccurrence(DateTime.UtcNow);

        IEnumerable<DateTime> vList = vCron.GetOccurrences(vLastRun, DateTime.UtcNow).Take(2);

        if(vList.Count() > 1) {

            vMissedRun = true;

        }

        Console.WriteLine(" - - - - Now - - - - ");

        Console.WriteLine(DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ss")); 

        Console.WriteLine("");

        Console.WriteLine(" - - - - Old - - - - ");

        Console.WriteLine(vLastRunString); 

        Console.WriteLine(vLastRunTime.Value.ToString("yyyy-MM-dd HH:mm:ss"));

        Console.WriteLine("");

        Console.WriteLine(" - - - - New - - - - ");

        Console.WriteLine(DateTime.UtcNow.ToString("yyyy-MM-dd HH:mm:ss")); 

        Console.WriteLine(vNewRunTime.Value.ToString("yyyy-MM-dd HH:mm:ss")); 

        Console.WriteLine("");

        Console.WriteLine(" - - - - Scheduled Values - - - - ");

        Console.WriteLine(vList.Count());

        Console.WriteLine("");

        foreach(var c in vList) {

            Console.WriteLine(c.ToString("yyyy-MM-dd HH:mm:ss"));

        }

        Console.WriteLine(" - - - - Missed? - - - - ");

        Console.WriteLine(vMissedRun);

    }

}