CurrentLocalTimeForTimeZone

public static DateTime CurrentLocalTimeForTimeZone(this TimeZoneInfo tzi)
{
    return System.TimeZoneInfo.ConvertTimeBySystemTimeZoneId(DateTime.Now, tzi.Id);
}

static int Main()
{
    ReadOnlyCollection<TimeZoneInfo> arrTzi = TimeZoneInfo.GetSystemTimeZones();
    foreach(TimeZoneInfo tzinfo in arrTzi)
    {
        DateTime dt = tzinfo.CurrentLocalTimeForTimeZone();
        Console.Write(tzinfo.Id);
        Console.Write(" ");
        Console.Write(tzinfo.DisplayName);
        Console.Write(" : ");
        Console.WriteLine(dt.ToString("F"));
    }
    return 0;
}