using System;

public class Program

{

    public static void Main()

    {

        var utc = TimeZoneInfo.FindSystemTimeZoneById("UTC").BaseUtcOffset;

        var gmt = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time").BaseUtcOffset;

        var aus = TimeZoneInfo.FindSystemTimeZoneById("AUS Eastern Standard Time").BaseUtcOffset;

        Console.WriteLine(string.Format("UTC: {0}", utc));

        Console.WriteLine(string.Format("GMT: {0}", gmt));

        Console.WriteLine(string.Format("AUS: {0}", aus));

    }

}