public IActionResult Details(int?Id)
 {
     if (Id != null)
     {
         return(View(_InvoiceDetail.GetInvoice_Detail(Id)));
     }
     else
     {
         return(NotFound());
     }
 }
        public IActionResult Details(int?Id)
        {
            if (Id != null)
            {
                Invoice_details model = _InvoiceDetail.GetInvoice_Detail(Id ?? 1);

                return(View(model));
            }
            else
            {
                return(NotFound());
            }
        }