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WCF WebHttp Service using POCO from EntityFramework 4.1 - dbContext
[ServiceContract]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
public class SearchService
{

    [WebGet(UriTemplate = "Students")]
    public List<coop_Students> GetStudents()
    {
        List<string> ret = new List<string>();

        CottageDataEntities db = new CottageDataEntities();
        var students = from s in db.coop_Students
                       where s.status == "enrolled"
                       orderby s.lastname, s.firstname
                       select s;
        return students.ToList();

    }

    [WebGet(UriTemplate = "Echo/{text}")]
    public string Echo(string text)
    {
        return "Hello " + text;
    }

    [WebGet(UriTemplate = "Students/{studentID}")]
    public coop_Students GetStudent(string studentID)
    {
        using (CottageDataEntities db = new CottageDataEntities())
        {
            int id = int.Parse(studentID);
            var student = db.coop_Students.FirstOrDefault(s => s.studentID == id);
            return student;
        }
    }
}