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Throw Application event from button click event handler

<Window x: Class="PreventSessionEnd.Window1"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="PreventSessionEnd" Height="300" Width="300"     >     <Grid Margin="5">       <Button Click="cmdException_Click">Throw an Unhandled Exception</Button>     </Grid> </Window> //File:Window.xaml.vb Imports System Imports System.Windows Imports System.Windows.Controls Imports System.Windows.Data Imports System.Windows.Documents Imports System.Windows.Media Imports System.Windows.Media.Imaging Imports System.Windows.Shapes Namespace PreventSessionEnd   Public Partial Class Window1     Inherits Window     Public Sub New()       InitializeComponent()     End Sub     Private Sub cmdException_Click(sender As Object, e As RoutedEventArgs)       Throw New ApplicationException("You clicked a bad button.")     End Sub   End Class End Namespace