using System;

using CoordinateSharp;

using NodaTime;

using GeoTimeZone;

public class Program

{

    public static void Main()

    {

        //Location

        double lat = 45.453;

        double lng = -122.345;

        //Current Date

        DateTime date = DateTime.Now;

        //Get Time Zone ID at location (GeoTimeZone

        string timeZoneId = TimeZoneLookup.GetTimeZone(lat, lng).Result;

        // Get the DateTimeZone from the IANA ID (NodaTime)

        DateTimeZone zone = DateTimeZoneProviders.Tzdb[timeZoneId];

        DateTime d = DateTime.Now.ToUniversalTime(); //Date must have DateTimeKind of UTC

        Instant instant = Instant.FromDateTimeUtc(Convert.ToDateTime(DateTime.Now.ToUniversalTime()));

        Offset offset = zone.GetUtcOffset(instant);

        //Create Coordinate, and set to local time

        Coordinate c = new Coordinate(lat,lng,date);

        c.Offset = offset.ToTimeSpan().TotalHours;

        Console.WriteLine($"Time Zone: {timeZoneId}");

        Console.WriteLine($"Time Zone Offset: {c.Offset}");

        Console.WriteLine($"Sunset: {c.CelestialInfo.SunSet}");

    }

}