public ActionResult AddTask(jTask task)
 {
     var repo = Session["Tasks"] as TaskRepository;
     repo.AddTask(task);
     Session["Tasks"] = repo;
     if (Request.IsAjaxRequest())
     {
         return Json(task);
     }
     return RedirectToAction("Index");
 }
 public void AddTask(jTask task)
 {
     task.Id = _id;
     _id++;
     Tasks.Add(task);
 }