GetPreviousAdjustmentRule()

AdjustmentRule System.TimeZoneInfo.GetPreviousAdjustmentRule ( AdjustmentRule rule, int? ruleIndex )

inlineprivate

Definition at line 1073 of file TimeZoneInfo.cs.

    {
        if (ruleIndex.HasValue && 0 < ruleIndex.GetValueOrDefault() && ruleIndex.GetValueOrDefault() < _adjustmentRules.Length)
        {
            return _adjustmentRules[ruleIndex.GetValueOrDefault() - 1];
        }
        AdjustmentRule result = rule;
        for (int i = 1; i < _adjustmentRules.Length; i++)
        {
            if (rule == _adjustmentRules[i])
            {
                result = _adjustmentRules[i - 1];
                break;
            }
        }
        return result;
    }

References System.TimeZoneInfo._adjustmentRules, and System.Runtime.Serialization.Dictionary.

Referenced by System.TimeZoneInfo.GetAdjustmentRuleForAmbiguousOffsets(), System.TimeZoneInfo.GetDaylightSavingsStartOffsetFromUtc(), and System.TimeZoneInfo.GetDaylightTime().