using System;

public class Program

{

    public void Main()

    {

        DateTime? myLocalTime = Convert.ToDateTime("07/17/2016 12:28 PM");

        Console.WriteLine(myLocalTime);

        string givenTz = "Central";

        DateTime? resultUtc = ConvertDateTimeToUtc(myLocalTime, givenTz);

        Console.WriteLine(resultUtc);

        // Get time in local time zone 

        //DateTime thisServerTime = DateTime.Now;

        //Console.WriteLine("Now in {0} zone: {1}", TimeZoneInfo.Local.IsDaylightSavingTime(thisServerTime) ? TimeZoneInfo.Local.DaylightName : TimeZoneInfo.Local.StandardName, thisServerTime);

        //Console.WriteLine("   UTC thisServerTime Time: {0}", TimeZoneInfo.ConvertTimeToUtc(thisServerTime, TimeZoneInfo.Local));

        //DateTime myLocalTime = Convert.ToDateTime("11/17/2016 12:28 PM");

        //Console.WriteLine("Now in {0} zone: {1}", TimeZoneInfo.Local.IsDaylightSavingTime(myLocalTime) ? TimeZoneInfo.Local.DaylightName : TimeZoneInfo.Local.StandardName, myLocalTime);

        //Console.WriteLine("   UTC myLocalTime Time: {0}", TimeZoneInfo.ConvertTimeToUtc(myLocalTime, TimeZoneInfo.Local));

        //TimeZoneInfo tz = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");

        //Console.WriteLine("Time in {0}", tz.IsDaylightSavingTime(myLocalTime) ? tz.DaylightName : tz.StandardName);

        //DateTime tstTime = TimeZoneInfo.ConvertTime(thisServerTime, TimeZoneInfo.Local, tz);  

        //Console.WriteLine("Time in {0} zone: {1}", tz.IsDaylightSavingTime(tstTime) ? tz.DaylightName : tz.StandardName, tstTime);

        //Console.WriteLine("   UTC Time: {0}", TimeZoneInfo.ConvertTimeToUtc(tstTime, tz));

    }   

    public static void Main2()

    {

        DateTime currentLocalDT = DateTime.Now.AddHours(-6);

        Console.WriteLine("Local: {0}", currentLocalDT);

        //DateTime convertedByExtension = currentLocalDT.ConvertDateTimeToUtc("Central");

        //Console.WriteLine("Extendsion: {0}", convertedByExtension);

        DateTime? convertedDate = currentLocalDT;

        DateTime? convertedDate1 = DateTime.UtcNow;

        //TimeZoneInfo tzInfo = TimeZoneInfo.FindSystemTimeZoneById();

        //DateTime compareDT = TimeZoneInfo.ConvertTimeToUtc(currentDT, );

        //if(currentDT.Kind == DateTimeKind.)

        TimeZone localZone = TimeZone.CurrentTimeZone;

        //Central Standard Time

        //Central Standard Time\Dynamic DST

        var dt = DateTime.UtcNow;

        Console.WriteLine("UTC: {0}", dt.ToLocalTime());

        var tz = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");

        var utcOffset = new DateTimeOffset(dt, TimeSpan.Zero);

        Console.WriteLine(utcOffset.ToOffset(tz.GetUtcOffset(utcOffset)));

    }

    public DateTime? ConvertDateTimeToUtc(DateTime? localDateTime, string timeZone)

    {

        if(timeZone == null) { throw new Exception("Could not convert the datetime to UTC because the Timezone input was null."); }

        string zone;

        switch (timeZone)

        {

            case "Eastern":

            zone = "Eastern Standard Time";

            break;

            case "Central":

            zone = "Central Standard Time";

            break;

            case "Mountain":

            zone = "Mountain Standard Time";

            break;

            case "Pacific":

            zone = "Pacific Standard Time";

            break;

            default:

            throw new Exception(string.Format("Could not convert the provided timezone to a standard US timezone. ({0})", timeZone));

        }

        TimeZoneInfo tz = TimeZoneInfo.FindSystemTimeZoneById(zone);

        string tzNameAfterDaylightSavingTimeCheck = tz.IsDaylightSavingTime(Convert.ToDateTime(localDateTime)) ? tz.DaylightName : tz.StandardName;

        DateTime? utcDateTime = TimeZoneInfo.ConvertTimeToUtc(Convert.ToDateTime(localDateTime), tz);

        return utcDateTime;

    }

​

}

​