c# 优化代码: var timePeriodList = new ListTimeSpanRange; foreach var timePeriod in mainPeriodList var tmp = timePeriodListFindp = pStartTim
var timePeriodList = main.PeriodList .GroupBy(p => new { p.StartTime, p.EndTime }) .Select(g => new TimeSpanRange(g.Key.StartTime, g.Key.EndTime)) .ToList();
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