asp.net - Lazy loading not working in Entity Framework -

i have 2 classes connected using virtual keyword:

student:

public class student {     public int studentid{get; set;}     public string lastname { get; set; }     public string firstname { get; set; }     public datetime enrollmentdate { get; set; }     public virtual ienumerable<enrollment> enrollments { get; set; } } 

enrollment:

public class enrollment {     public int enrollmentid { get; set; }     public int courseid { get; set; }     public int studentid { get; set; }     public decimal? grade { get; set; }     public virtual course course { get; set; }     public virtual student student { get; set; } } 

both tables populated, , have corresponding records (for instance, there student id 1 , enrollments student id 1).

i'm pulling student it's id , sending view

student student = db.students.find(id); return view(student); 

in view can display details student. @model contain enrollment property (at least comes in intellisense , doesn't red-line), null.

there course class:

{     public int courseid { get; set; }     public string coursename { get; set; }     public int totalcredits { get; set; } } 

since @model.enrollments null, can't access @model.enrollment.coursenamae.

edit: tried hack workaround:

ienumerable<student> temp = db.students.include(s => s.enrollments); student student = temp.firstordefault(s => s.studentid.equals(id)); return view(student); 

this giving me error on second line:

system.invalidoperationexception: specified include path not valid. entitytype 'myfirstproject2.models.student' not declare navigation property name 'enrollments'.

does offer clues?

a little bit late here explanation between lazy loading vs eager loading

and rules lazy loading:

1. context.configuration.proxycreationenabled should true.
2. context.configuration.lazyloadingenabled should true.
3. navigation property should defined public, virtual. context not lazy loading if property not define virtual.

edit: 1 last thing relationships use:

public virtual icollection<enrollment> enrollments { get; set; } 

other links:

lazy loading

eager loading

explicit loading