.net 如何查询List中某个出现次数大于2次的元素

[GoodDbye]

List<string> listname = new List<string>();
Queue<List<string>> listQue = new Queue<List<string>>(3);
List<string> list1 = new List<string>() { "阿里", "腾讯", "百度" };
List<string> list2 = new List<string>() { "苹果", "微软", "谷歌", "FaceBook", "英特尔", "吉利德", "亚马逊" };
List<string> list3 = new List<string>() { "苹果", "微软", "甲骨文", "英特尔", "IBM", "高通" };
List<string> list4 = new List<string>() { "苹果", "微软", "谷歌", "阿里", "FaceBook", "腾讯", "百度", "亚马逊", "京东" };
List<string> list5 = new List<string>() { "阿里", "腾讯", "亚马逊", "京东" };
List<string> list6 = new List<string>() { "58", "赶集", "高通", "甲骨文", "索尼" };
listQue.Enqueue(list1);
listQue.Enqueue(list2);
listQue.Enqueue(list3);
if (listQue.Count == 3)
{
//判断某个元素出现2次，把该元素加到listname里面（list1，list2和list3中出现2次以上的元素，是“苹果”，“微软”，“英特尔”）
//接着list1出队，list4入队，在执行一次if里面的方法
//即list2，list3和list4的元素出现2次以上，即“苹果”，“微软”，“谷歌”，“Facebook”，“英特尔”和“亚马逊”6个元素
}
求大神给个思路哇

[娃都会打酱油了]

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;

[而立大叔]

使用LINQ进行处理

[exception92]

#1 正解。

[GoodDbye]

引用 1 楼 starfd 的回复:

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;

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

[GoodDbye]

引用 1 楼 starfd 的回复:

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;

已解决，感谢，分都给你了