LINQ中具有多个表计数的Group by

Sql查询到LINQ：两者都粘贴在这里，在LINQ中遇到问题-需要建议：

select bm.MachineId,al.AlarmId,am.AlarmName, count(al.AlarmId)AlarmCount 
from BatchMachineWise bm 
join AlarmLog al on bm.MachineId = al.MachineId
join Alarm am on am.AlarmId = al.AlarmId
where bm.BatchId = 12476
group by bm.MachineId,al.AlarmId,am.AlarmName

---

GroupBy

返回接口，该接口应用于访问用于分组的字段：

select new AlarmSummary
{
    MachineId = gr.Key.MachineId,
    AlarmId = gr.Key.AlarmId, 
    AlarmName = gr.Key.AlarmName
    ....
}

---

gr.Key.MachineId

gr.Key.AlarmId

gr.Key.AlarmName

？另外，请不要将代码和错误作为图像发布，因为它们基本上是文本。非常感谢！它是resolved@user10181000我很乐意帮忙！