namespace System
{
    public sealed class TimeZoneInfo : IEquatable<TimeZoneInfo?>, IDeserializationCallback, ISerializable
    {
        public sealed class AdjustmentRule : IEquatable<AdjustmentRule?>, IDeserializationCallback, ISerializable
        {
            public static AdjustmentRule! CreateAdjustmentRule(DateTime dateStart, DateTime dateEnd, TimeSpan daylightDelta, TransitionTime daylightTransitionStart, TransitionTime daylightTransitionEnd, TimeSpan baseUtcOffsetDelta);
        }
    }
}