private void Btn_Login_Click(object sender, RoutedEventArgs e) { User_Controller user = new User_Controller(); string _username = Txt_Username.Text; string _password = Txt_Password.Password; var result = user.Login(_username, _password); if (result == true) { this.Hide(); Home home = new Home(_username); home.Show(); this.Close(); } else { MessageBox.Show("User/Password Error!"); } }