xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="My Xaml App" Height="200" Width="300" WindowStartupLocation ="CenterScreen"> Exit Application //File:Window.xaml.csusing System;using System.Windows;using System.Windows.Controls;namespace WpfApplication1{ public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } private void btnExitApp_Clicked(object sender, RoutedEventArgs e) { Application.Current.Shutdown(); } }}