using RestSharp;

using System;

​

public class Program

{

    public static void Main(string[] args)

    {

        // Algeria

        var myDateTime = GetLocalDateTime(29.204918, 1.845703, DateTime.Now);

        Console.WriteLine(myDateTime.ToString());

​

        // California

        myDateTime = GetLocalDateTime(34.020084, -118.182678, DateTime.Now);

        Console.WriteLine(myDateTime.ToString());

    }

​

    public static DateTime GetLocalDateTime(double latitude, double longitude, DateTime date)

    {

        var client = new RestClient("https://maps.googleapis.com");

        var request = new RestRequest("maps/api/timezone/json", Method.GET);

        request.AddParameter("location", latitude + "," + longitude);

        request.AddParameter("timestamp", date.ToTimestamp());

        request.AddParameter("sensor", "false");

        var response = client.Execute<GoogleTimeZone>(request);

        return date.AddSeconds(response.Data.rawOffset + response.Data.dstOffset);

    }

}

​

public class GoogleTimeZone

{

    public double dstOffset { get; set; }

    public double rawOffset { get; set; }

    public string status { get; set; }

    public string timeZoneId { get; set; }

    public string timeZoneName { get; set; }

}

​

public static class DateTimeExtensionMethods

{

    public static double ToTimestamp(this DateTime date)

    {

        return date.ToUniversalTime().Subtract(new DateTime(1970, 1, 1, 0, 0, 0)).TotalSeconds;

    }

}