private void AddNewCustomerButton_OnClick(object sender, RoutedEventArgs e) { string name = AddCustomerNameTextBox.Text; string firstName = AddCustomerFirstNameTextBox.Text; string address = AddCustomerAddressTextBox.Text; string city = AddCustomerCityTextBox.Text; string county = AddCustomerCountyTextBox.Text; string phoneNumber = AddCustomerPhoneNumberTextBox.Text; string email = AddCustomerEmailTextBox.Text; if (!FieldsCompleted(name, firstName, address, city, county, phoneNumber)) { AddCustomerDisplayInfoTextBlock.Text = @"Must complete mandatory fields."; } else { AddNewCustomerButton.IsEnabled = true; List <Auto> cars = new List <Auto>(); Client client = new Client() { Nume = name, Prenume = firstName, Adresa = address, Localitate = city, Judet = county, Telefon = phoneNumber, Email = email, Automobile = cars.ToArray() }; _client.AddCustomer(client); AddCustomerDisplayInfoTextBlock.Text = @"Client added."; AddCustomerDisplayInfoTextBlock.Visibility = Visibility.Visible; } CustomersTabItem_OnLoaded(sender, e); }