using System;

public class Program

{

    public static void Main()

    {       

        Console.WriteLine("-----");

        Console.WriteLine("Basic TZ Check");

        DateTime dtJan = new DateTime(2019,1,1,5,0,0);

        Console.WriteLine("Using a base time of: " + dtJan);

        Console.WriteLine("-----");

        Console.WriteLine();

        WriteTest("E. Australia Standard Time", dtJan);

        WriteTest("AUS Eastern Standard Time", dtJan);      

        Console.WriteLine("-----");

        Console.WriteLine("Basic TZ Check");

        DateTime dt = new DateTime(2019,8,7,10,0,0);

        Console.WriteLine("Using a base time of: " + dt);

        Console.WriteLine("-----");

        Console.WriteLine();

        WriteTest("E. Australia Standard Time", dt);

        WriteTest("AUS Eastern Standard Time", dt);     

    }

    public static void WriteTest(string tz, DateTime dt){

        TimeZoneInfo tzi = TimeZoneInfo.FindSystemTimeZoneById(tz);

        Console.WriteLine("Begin Test for TZ: " + tzi.DisplayName + " AKA " + tz);

        Console.WriteLine("TZ UTC Offset at base time: " + tzi.GetUtcOffset(dt));

        DateTimeOffset newDto = new DateTimeOffset(dt, tzi.GetUtcOffset(dt));

        Console.WriteLine("The UTC is: " + newDto.UtcDateTime);

        Console.WriteLine("The Local Time is: " + TimeZoneInfo.ConvertTime(newDto.UtcDateTime.AddHours(5), tzi));       

        Console.WriteLine("This Time Zone is in Daylight Savings: " + tzi.IsDaylightSavingTime(newDto));        

        Console.WriteLine("-----");

        Console.WriteLine();

    }

}