using System;
using System.Globalization;
public class Test
{
public static void Main()
{
DateTimeOffset dto;
dto = new DateTimeOffset(2007, 11, 4, 1, 30, 0, new TimeSpan(-7, 0, 0));
Console.WriteLine(TimeZoneInfo.Local.IsAmbiguousTime(dto));
Console.WriteLine(dto.LocalDateTime);
dto = new DateTimeOffset(2007, 11, 4, 2, 30, 0, new TimeSpan(-7, 0, 0));
Console.WriteLine(TimeZoneInfo.Local.IsAmbiguousTime(dto));
Console.WriteLine(dto.LocalDateTime);
}
}