How to do following in Entity Framework 4.1 using Linq

Assume the above given data model, how to execute following query in EF 4.1

Select 
   students.firstname
   ,students.lastname
   ,classes.classname
   ,IsNull(studentscl开发者_JAVA百科asses.id,0) Attending 
from students
cross join classes 
left outer join studentsclasses on studentsclasses.classid = classes.classid 
            and studentsclasses.studentid = students.studentid
where students.studentid = 5

following is my attempt

from s in Students
from c in Classes
select new {
              StudentFirstName = s.Firstname,
              StudentLastName = s.Lastname,
              ClassName = c.Classname
           }

In Entity Framework the relationship between students and classes should be represented by a navigation property classes in each student Entity that contains all the classes the student is related to. Using this you can do:

var student = Students.FirstOrDefault( s = > s.studentid == 5);
if(student!=null)
{
  var studentClasses = student.classes.Select( c => new
  {
     StudentFirstName = student.Firstname,
     StudentLastName = student.Lastname,
     ClassName= c.Classname     
  });
  //..
}