get timezone and location name using latitude and longitude in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using RestSharp;
using System.Xml;
using System.IO;
namespace LocationTimeZone
{
class Program
{
const string GOOGLE_API = "https://maps.googleapis.com";
const string GOOGLE_TIMEZONE_REQUEST =
"maps/api/timezone/xml";

// Pensacola, FL
const double LATITUDE = 27.172079;
const double LONGITUDE = 78.036618;

// ****************************************************** Main

static void Main(string[] args)
{
string time_zone = String.Empty;

time_zone = get_time_zone(LATITUDE,
LONGITUDE,
DateTime.Now);

//this will take timezone object i.e timezone id to give the current date time
DateTime timeUtc = DateTime.Now;
string s = time_zone;
TimeZoneInfo cstZone = TimeZoneInfo.FromSerializedString(time_zone);// issue is here when debug says null in the timezone object
DateTime cstTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, cstZone);
Console.WriteLine("Current date time of the given timezone -received from latitude and longitude" + cstZone);

Console.WriteLine("Timezone" + time_zone);
Console.Write("Press any key to exit");
Console.ReadKey();
}

// ********************************************* get_time_zone

static string get_time_zone(double latitude,
double longitude,
DateTime date)
{
RestClient client;
string location;
RestRequest request;
RestResponse response;
TimeSpan time_since_midnight_1970;
double time_stamp;
string time_zone = "In error";

try
{
client = new RestClient(GOOGLE_API);
request = new RestRequest(GOOGLE_TIMEZONE_REQUEST,
Method.GET);
location = String.Format("{0},{1}",
latitude,
longitude);
time_since_midnight_1970 = date.Subtract(
new DateTime(1970, 1, 1, 0, 0, 0));
time_stamp = time_since_midnight_1970.TotalSeconds;

request.AddParameter("location", location);
request.AddParameter("timestamp", time_stamp);
request.AddParameter("sensor", "false");

response = (RestResponse)client.Execute(
request);
if (response.StatusDescription.Equals("OK"))
{
XmlNode node;
XmlDocument xml_document = new XmlDocument();

xml_document.LoadXml(response.Content);
node = xml_document.SelectSingleNode(
"/TimeZoneResponse/time_zone_name");

if (node != null)
{
time_zone = node.InnerText;
}
}
}
catch (Exception ex)
{
time_zone = "In error";
}

return (time_zone);
}


}
}


the issue with this not able to take timezone object that has timezone id to get current date time and also not able to get location name on basis of this.PLZ help me regarding this.

I answered your location name from lat/long above.

Current date time is DateTime.Now.

thanks i got the location name by changes i made by passing timezone object from the code and passed into timzoneinfo.gettimezonebid() method.
I am getting in terms UTC+6:00, But i need date and time current format. tell me what to do plz

For date time formatting see Custom Date and Time Format Strings.

I am going to guess that the latitude and longitude you supplied to the Google API was somewhere in India. Thus the UTC+6. If by "current format" you mean some other time zone, then see Converting Times Between Time Zones.

Hope that helps.