public IActionResult DeletePatientInvoiceItem(long id)
        {
            PatientInvoiceItem patientInvoiceItem = item_repo.Find(id);

            if (patientInvoiceItem == null)
            {
                return(NotFound());
            }

            item_repo.Delete(patientInvoiceItem);
            return(Ok());
        }
 public IActionResult AddPatientInvoiceItem([FromBody] PatientInvoiceItem model)
 {
     item_repo.Add(model);
     return(new OkObjectResult(new { PatientInvoiceItemID = model.PatientInvoiceItemId }));
 }