We are using C# and I'm quite stuck on this one step

In the try block of the Modify button click event handler, add code that calls the SimulateConcurrentUpdate() method and passes it the value of the ProductCode property of the class Product variable. This code should go right before the UpdateProduct() method is called.

== frmProductMaintenance.cs* + x MMABooksDB.cs App.config Product.cs nce Product Maintenance.frmProduct 1/Step 21 Review modify button click event handler Notice call of HandleConcurrencyConflict() 1 reference private void btnModify_Click(object sender, EventArgs e) { Product oldProduct = this.CloneProduct(); frmAddModify addModifyForm = new frmAddModify { AddProduct = false, Product = selectedProduct }; DialogResult result = addModifyForm.ShowDialog(); if (result DialogResult.OK) { try { selectedProduct = addModifyForm.Product; if(ProductDB.UpdateProduct(oldProduct, selectedProduct)) { this.DisplayProduct(); } else { this.HandleConcurrencyConflict(); } } catch (SqlException ex) { this.HandleDatabaseError(ex); } catch (Exception ex) { this.HandleGeneralError(ex); }