使用LINQ選擇最常見的值使用LINQ

Question

我想選擇我的表中最常見的五個值，並將它們返回到列表中。

var mostFollowedQuestions = (from q in context.UserIsFollowingQuestion 
           select *top five occuring values from q.QuestionId*).toList(); 

任何想法？

感謝

Answer 1

 var mostFollowedQuestions = context.UserIsFollowingQuestion 
            .GroupBy(q => q.QuestionId) 
            .OrderByDescending(gp => gp.Count()) 
            .Take(5) 
            .Select(g => g.Key).ToList(); 

Answer 2

int[] nums = new[] { 1, 1, 1, 2, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7 }; 

IEnumerable<int> top5 = nums 
      .GroupBy(i => i) 
      .OrderByDescending(g => g.Count()) 
      .Take(5) 
      .Select(g => g.Key);