.net 如何查询List<string>中某个出现次数大于2次的元素

Question

Queue<List<string>> listQue = new Queue<List<string>>(3);
            var query = from q in listQue
                        let t = q
                        from s in t
                        select s;
            var query2 = from q in query
                         group q by q into g
                         where g.Count() > 1
                         let t = g
                         from s in t
                         select s;

Answer 1

亲，为什么我把结果foreach输出是输出2次，你这不是group by了么