public ActionResult Book(string ToBook)
        {
            Apartment     a    = _myBll.GetExactApartment(ToBook);
            List <string> list = new List <string>();

            a.GetReservedDates().ForEach(f => list.Add(f.ToString("yyyy-MM-dd")));
            var res = list.ToArray();

            ViewBag.Dateses = res;
            return(View(a));
        }