WPF C# Tutorial

  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:system="clr-namespace:System.Windows;assembly=PresentationFramework"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Main Window" Height="310" Width="280" Closing="Window1_Closing">

//File:Window.xaml.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Media;
namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
        private void Window1_Closing(object sender, CancelEventArgs e)
        {
            Application.Current.Shutdown();
        }
    }
}