private void SignUp_Click(object sender, RoutedEventArgs e) { var username = Username.Text; var password = Password.Password; AuthenticationManager auth = new AuthenticationManager(); var authCred = auth.AuthIsCorrect(username, password); if (authCred == "Incorrect Credentials") { MessageBox.Show("Incorrect Credentials. Please input valid credentials"); Username.Text = ""; Password.Clear(); } else { Cred = authCred; switch (auth.GetRole(Cred)) { case 'C': Home windowHome = new Home(); Application.Current.MainWindow.Close(); windowHome.Show(); break; case 'A': Portal windowPortal = new Portal(); Application.Current.MainWindow.Close(); windowPortal.Show(); break; default: break; } } }