//File:Window.xaml.cs using System; using System.Collections.Generic; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Shapes; using System.Threading; using System.Windows.Threading; namespace DispatcherExamples { public partial class UseVerifyAccess : System.Windows.Window { public UseVerifyAccess() { InitializeComponent(); fromUiButton.Click += new RoutedEventHandler(fromUiButton_Click); } void fromUiButton_Click(object sender, RoutedEventArgs e) { string resultText; try { resultText = "Success"; } catch (Exception x) { resultText = x.ToString(); } Dispatcher.BeginInvoke(DispatcherPriority.Normal, (ThreadStart)delegate { result.Text = resultText; }); } } }