public ActionResult IndexKolGrads() { string userName = HttpContext.User.Identity.Name; Student stu = _StudentService.GetByUserId(_UserService.GetUserByUserName(userName).Id); IEnumerable <AverageClass> cl = _ElectionService.ComputeStudentAvg(stu); ViewBag.avglist = cl; ViewBag.koll = cl.Sum(x => ((x.Average.HasValue) ? x.Average.Value : 0)) / (cl.Count() > 0?cl.Count():1); return(View()); }