C# 使用linq进行分组和聚合

您好，下面有一个列表，需要使用Linq方法语法进行分组和聚合

| id      |Code|Descr | Number | Expiry    |
|---------|----|------|--------|-----------|
| guidId1 | A  | Desc1| Number1| 2017-03-18|
| guidId2 | A  | Desc1| Number1| 2017-03-18|
| guidId3 | B  | Desc2| Number1| 2017-03-18|
| guidId4 | B  | Desc2| Number1| 2017-03-18|
| guidId5 | C  | Desc3| Number1| 2017-03-18|
| guidId6 | A  | Desc1| Number2| 2020-05-20|
| guidId7 | A  | Desc1| Number2| 2020-05-20|
| guidId8 | A  | Desc1| Number2| 2020-05-20|
| guidId9 | B  | Desc2| Number2| 2020-05-20|
| guidId10| C  | Desc3| Number2| 2020-05-20|
| guidId11| C  | Desc3| Number2| 2020-05-20|

我尝试过这一点，但不确定如何包括计数：

myList.GroupBy(s => new { s.Number, s.Code, s.Expiry});

我希望从列表中获得的输出：

{Code = "A",Descr = "Desc1",Number = "Number1",Expiry = "2017-03-18", Count = 2}
{Code = "B",Descr = "Desc2",Number = "Number1",Expiry = "2017-03-18", Count = 2}
{Code = "C",Descr = "Desc3",Number = "Number1",Expiry = "2017-03-18", Count = 1}
{Code = "A",Descr = "Desc1",Number = "Number2",Expiry = "2020-05-20", Count = 3}
{Code = "B",Descr = "Desc2",Number = "Number2",Expiry = "2020-05-20", Count = 1}
{Code = "C",Descr = "Desc3",Number = "Number2",Expiry = "2020-05-20", Count = 2}

---

提前感谢

您已将

编号

、

代码

和

到期

进行分组，但您的结果也需要

说明

。您需要将其包括在您的组中，然后获取组数

var query =
    from s in myList
    group 1 by new { s.Code, s.Descr, s.Number, s.Expiry } into g
    select new { g.Key.Code, g.Key.Descr, g.Key.Number, g.Key.Expiry, Count = g.Count() };

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你能在上分享你的代码片段吗？谢谢你，先生！这真的很有帮助。