Exemplos de WPF 3.5 (Windows Presentation Foundation) - 003 - Parse on the fly

//Window1.cs
using System.Windows;
using System.Windows.Controls;
using System.Windows.Markup;
using System.IO;


namespace _003_ParseOnTheFly
{
    class Window1 : Window
    {
        private Button button1;
        public Window1()
        {
            InitializeComponent();
        }
        private void InitializeComponent()
        {
            this.Width = this.Height = 285;
            this.Left = this.Top = 100;
            this.Title = "XAML carregado dinamicamente";
    
            FileStream s = new FileStream("Controles.xml", FileMode.Open);
            DependencyObject rootElement = (DependencyObject)XamlReader.Load(s);
            this.Content = rootElement;


            button1 = (Button)LogicalTreeHelper.FindLogicalNode(rootElement, 
                        "button1");
            
            button1.Click += button1_Click;
        }
        private void button1_Click(object sender, RoutedEventArgs e)
        {
            button1.Content = "é obediente, mesmo...";
        }
    }
}

<?xml version="1.0" encoding="utf-8" ?>
<!--Controles.xml-->
<DockPanel xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
  <Button Name="button1" Margin="30">Clique aqui...</Button>
</DockPanel>

//Program.cs
using System.Windows;
using System;


namespace _003_ParseOnTheFly
{
    public class Program : Application
    {
        [STAThread()]
        public static void Main()
        {
            Program app = new Program();
            app.MainWindow = new Window1();
            app.MainWindow.ShowDialog();
        }
    }
}