private void btnLogin_Click(object sender, System.Windows.RoutedEventArgs e) { try { AccendoSVC.ResearchOutputWCFClient proxy = new Accendo.AccendoSVC.ResearchOutputWCFClient(); proxy.LoginCompleted += new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(proxy_LoginCompleted); proxy.LoginAsync(txtTitle.Text, txtPassword.Password); } catch { } }