private void ConfirmEdit()
        {
            Modifiable = false;
            var originalProduct = persistance.GetProductList();

            if (oldProduct == null)
            {
                var id = persistance.AddProductToDB(SelectedProduct);
                SelectedProduct.ID = id;
            }
            else
            {
                oldProduct = null;
                persistance.UpdateProductDB(SelectedProduct);
            }
        }