protected bool Equals(PeriodList other) => string.Equals(TzId, other.TzId, StringComparison.OrdinalIgnoreCase) && CollectionHelpers.Equals(Periods, other.Periods);
protected bool Equals(PeriodList other) { return(string.Equals(TzId, other.TzId) && CollectionHelpers.Equals(Periods, other.Periods)); }