Linq 在实体框架中的运算符中实现

我尝试在实体框架中实现这个SQL查询

select * 
from students 
where student.fieldid in (select fieldid from fields where groupid = 10)

我想这是一种方法：

var fields = context.fields.where(t=>t.groupid = 10).toList();

var result = context.students.where(t=> fields.Contains(t.fieldid)).toList();

但这是行不通的

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还有其他人尝试过这样做吗？

中的SQL

相当于LINQ
包含的

var names = new string[] { "Alex", "Colin", "Danny", "Diego" };    
var matches = from person in people
              where names.Contains(person.Firstname)
              select person;

因此，SQL语句：

select * from students where student.fieldid in ( select fieldid from fields 
where groupid = 10)

在LINQ中等同于：

var fieldIDs= from  Fids in db.fields
              where Fids.groupid==10
              select Fids.fieldid;

var results= from s in db.students
             where fieldIDs.Contains(s.fieldid)
             select s;