public IActionResult Create()
        {
            var model = new NewBillTypeDetails();

            model.Type       = new BillType();
            model.PriceParts = new List <BillPricePart>();
            model.PriceParts.Add(new BillPricePart());
            return(View(model));
        }
        public void CreatePost([FromForm] NewBillTypeDetails billData)
        {
            _context.BillTypes.Add(billData.Type);
            foreach (var billPart in billData.PriceParts)
            {
                billPart.Type = billData.Type;
                _context.BillPriceParts.Add(billPart);
            }

            _context.SaveChanges();
            Redirect("/BillMeasures");
        }