public ActionResult DeleteConfirmed(int id)
{
if (!coursesRepository.IsTeacherInCourse(id, User.Identity.GetUserId(), User.IsInRole("Administrator")) && !User.IsInRole("Administrator"))
{
throw new HttpException((int)HttpStatusCode.Forbidden, "Forbidden!");
}
projectTasksRepository.RemoveProjectTask(projectTasksRepository.GetProjectTaskById(id));
return(RedirectToAction("Index"));
}