CreateAdjustmentRuleFromTimeZoneInformation()

static AdjustmentRule System.TimeZoneInfo.CreateAdjustmentRuleFromTimeZoneInformation ( in Interop::Kernel32::REG_TZI_FORMAT timeZoneInformation, DateTime startDate, DateTime endDate, int defaultBaseUtcOffset )

inlinestaticprivate

Definition at line 2418 of file TimeZoneInfo.cs.

    {
        if (timeZoneInformation.StandardDate.Month == 0)
        {
            if (timeZoneInformation.Bias == defaultBaseUtcOffset)
            {
                return null;
            }
            return AdjustmentRule.CreateAdjustmentRule(startDate, endDate, TimeSpan.Zero, TransitionTime.CreateFixedDateRule(DateTime.MinValue, 1, 1), TransitionTime.CreateFixedDateRule(DateTime.MinValue.AddMilliseconds(1.0), 1, 1), new TimeSpan(0, defaultBaseUtcOffset - timeZoneInformation.Bias, 0), noDaylightTransitions: false);
        }
        if (!TransitionTimeFromTimeZoneInformation(in timeZoneInformation, out var transitionTime, readStartDate: true))
        {
            return null;
        }
        if (!TransitionTimeFromTimeZoneInformation(in timeZoneInformation, out var transitionTime2, readStartDate: false))
        {
            return null;
        }
        if (transitionTime.Equals(transitionTime2))
        {
            return null;
        }
        return AdjustmentRule.CreateAdjustmentRule(startDate, endDate, new TimeSpan(0, -timeZoneInformation.DaylightBias, 0), transitionTime, transitionTime2, new TimeSpan(0, defaultBaseUtcOffset - timeZoneInformation.Bias, 0), noDaylightTransitions: false);
    }

References System.TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(), System.TimeZoneInfo.TransitionTime.CreateFixedDateRule(), System.Runtime.Serialization.Dictionary, System.DateTime.MinValue, System.TimeZoneInfo.TransitionTimeFromTimeZoneInformation(), and System.TimeSpan.Zero.

Referenced by System.TimeZoneInfo.TimeZoneInfo(), and System.TimeZoneInfo.TryCreateAdjustmentRules().