TimeZoneInfo also provides IsDaylightSavingTime and GetUtcOffset methods–the difference is that they accept either a DateTime or DateTimeOffset.

   
 

using System;
public class MainClass {
    public static void Main() {

        TimeZoneInfo wa = TimeZoneInfo.FindSystemTimeZoneById("W. Australia Standard Time");

        Console.WriteLine(wa.Id);
        Console.WriteLine(wa.DisplayName);
        Console.WriteLine(wa.BaseUtcOffset);
        Console.WriteLine(wa.SupportsDaylightSavingTime);
    }
}