このdouble foreachループをlambdaに変換するにはどうすればよいですか？

Question

これはforeachループへの道だけですラムダ式ですか？生活のために

private int getNextEventId() 
    { 
     int numOfEvents = 0; 

     foreach (MonthModel eventMonth in eventsForAllMonths) 
     { 
      foreach (DayModel eventDay in eventMonth.AllDays) 
      { 
       numOfEvents += eventDay.CalEvents.Count; 
      } 
     } 

     return numOfEvents + 1; 
    } 

Answer 1

int numOfEvents = eventsForAllMonths.SelectMany(m => m.AllDays) 
            .Select(d => d.CalEvents.Count) 
            .Sum(); 

Answer 2

I ForEach()ので、この程度

private int getNextEventId() 
    { 
     int numOfEvents = eventsForAllMonths.SelectMany(eventMonth => eventMonth.AllDays).Aggregate(0, (current, eventDay) => current + eventDay.CalEvents.Count); 

     return numOfEvents + 1; 
    } 

Answer 3

はこれを試してみてください？

return 
    (from m in eventsForAllMonths 
    from d in m.AllDays 
    select d.CalEvents.Count).Sum() + 1; 

Answer 4

return (eventsForAllMonths.SelectMany(eventMonth => eventMonth.AllDays).Sum(eventDay => eventDay.CalEvents.Count) + 1); 

Answer 5

方法：

eventsForallMonths.ForEach(em=>em.ForEach(ed=>numOfEvents+=ed.CalEvents.Count)); 

Answer 6

ラムダでこれを変換するのはどうですか？

List<Item> listItem = new List<Item>(); 
foreach (StackPanel sp in spPhotos.Children) 
{ 
    foreach(Item item in sp.Children) 
    { 
     listItem.Add(item); 
    } 
    sp.Children.Clear(); 
} 
spPhotos.Children.Clear();