public JsonResult GetCourseByOrganizationId(int id)
{
var courses = new List <Course>();
var dataList = examManager.GetOrganizationById(id);
foreach (var organization in dataList)
{
courses.AddRange(organization.Courses);
}
return(Json(courses.Select(c => new { c.Id, c.CourseName }), JsonRequestBehavior.AllowGet));
}