using System;

public class Program

{

    public static void Main()

    {

        var timezoneWinId = "Eastern Standard Time";

        var timezoneIanaId = "";

        var dateValue = "2020-07-02";

        var dateFormat = "yyyy-MM-ddTHH:mm:ss";

        var result = UpdateParameterDateWithOffset(dateValue, timezoneIanaId,timezoneWinId,dateFormat);

        var dateValue1 = "2020-07-02T01:14:41.843-04:00";

        var dateFormat1 = "yyyy-MM-dd HH:mm";

        var result1 = UpdateDateWithTimeZone(dateValue1, timezoneIanaId,timezoneWinId,dateFormat1);

        Console.WriteLine(result);

        Console.WriteLine(result1);

    }

     public static string UpdateParameterDateWithOffset(object dateValue, string timezoneIanaId, string timezoneWinId, string dateFormat)

        {

            if (dateValue == null) return "";

            DateTime dateOut;

            TimeZoneInfo timeZoneInfo;

            if (dateValue is string)

            {

                bool success = DateTime.TryParse((String)dateValue, out dateOut);

                if (!success) return "";

            }

            else

            {

                dateOut = (DateTime)dateValue;

            }

            try

            {

                timeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById(timezoneIanaId);

            }

            catch (TimeZoneNotFoundException e)

            {

                // var logger = GetLogger();

                // logger.Info(new EzeTelerikCustomFunctionsLogMessage<object[]>("Unix Time zone not found searching for windows timezone", null), e);

                timeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById(timezoneWinId);

            }

            var offSet = timeZoneInfo.GetUtcOffset(DateTime.UtcNow);

            var newDate = new DateTimeOffset(dateOut.Year, dateOut.Month, dateOut.Day, dateOut.Hour, dateOut.Minute, dateOut.Second, offSet);

            var startDateData = newDate.ToUniversalTime().ToString(dateFormat);

            return startDateData;

        }

    public static string UpdateDateWithTimeZone(object dateValue, string timezoneIanaId, string timezoneWinId, string dateFormat)

        {

            if (dateValue == null) return "";

            DateTime dateOut;

            TimeZoneInfo timeZoneInfo;

            if (dateValue is string)

            {

                bool success = DateTime.TryParse((String)dateValue, out dateOut);

                if (!success) return "";

            }

            else

            {

                dateOut = (DateTime)dateValue;

            }

            try

            {

                timeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById(timezoneIanaId);

            }

            catch(TimeZoneNotFoundException e)

            {

                // var logger = GetLogger();

                // logger.Info(new EzeTelerikCustomFunctionsLogMessage<object[]>("Unix Time zone not found searching for windows timezone", null), e);

                timeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById(timezoneWinId);

            }

            return TimeZoneInfo.ConvertTime(dateOut, timeZoneInfo).ToString(dateFormat);

        }

}