//File:Window.xaml.vb Imports System Imports System.Windows Imports System.ComponentModel Namespace WpfApplication1 Public Partial Class Window1 Inherits Window Public Sub New() InitializeComponent() End Sub Private Sub btnThrowHandledException_Click(sender As Object, e As RoutedEventArgs) Try Throw New NotImplementedException() Catch ex As NotImplementedException MessageBox.Show(ex.Message) End Try End Sub End Class End Namespace