using System;

public class Program

{

    public static void Main()

    {

         var sourceTimeZoneInfo = GetStateTimezone("VIC");

        Console.WriteLine("Source TimeZone: {0}",sourceTimeZoneInfo);

        var toConvert = DateTime.Parse("2022-10-02 02:59:59");

        Console.WriteLine("Source Time: {0}", toConvert);

        var converted =  TimeZoneInfo.ConvertTimeToUtc(toConvert, sourceTimeZoneInfo);

        Console.WriteLine("Converted Time: {0}", converted);

    }

     public static TimeZoneInfo GetStateTimezone(string state)

        {

            var timeZone = AusEasternStandardTime;

            if (!string.IsNullOrEmpty(state))

            {

                timeZone = GetTimeZoneStringFromState(state);

            }

            return TimeZoneInfo.FindSystemTimeZoneById(timeZone);

        }

​

        public static string GetTimeZoneStringFromState(string state)

        {

            var timeZone = AusEasternStandardTime;

            switch (state.ToUpper())

            {

                case "NSW":

                    timeZone = AusEasternStandardTime;

                    break;

                case "VIC":

                    timeZone = AusEasternStandardTime;

                    break;

                case "ACT":

                    timeZone = AusEasternStandardTime;

                    break;

                case "TAS":

                    timeZone = TasmaniaStandardTime;

                    break;

                case "SA":

                    timeZone = CentralAusStandardTime;

                    break;

                case "QLD":

                    timeZone = EastAusStandardTime;

                    break;

                case "NT":

                    timeZone = AusCentralStandardTime;

                    break;

                case "WA":

                    timeZone = WestAusStandardTime;

                    break;

                default:

                    break;

​

            }

            return timeZone;

        }

        public const string AusCentralStandardTime = "AUS Central Standard Time";  //+9.30  NT

        public const string AusEasternStandardTime = "AUS Eastern Standard Time";  //+10.00 ACT,NSW,VIC

        public const string CentralAusStandardTime = "Cen. Australia Standard Time"; //+9.30 SA

        public const string EastAusStandardTime = "E. Australia Standard Time"; //+10.00 QLD

        public const string TasmaniaStandardTime = "Tasmania Standard Time"; //+10.00 TAS

        public const string WestAusStandardTime = "W. Australia Standard Time";  //+8.00 WA

}