WPF C#

  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Window1" Height="135" Width="300">
  
    
  


//File:Window.xaml.cs
using System;
using System.Windows;
using System.ComponentModel;
namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }
        private void btnThrowUnhandledException_Click(object sender, RoutedEventArgs e)
        {
            throw new NotImplementedException();
        }
    }
}