Dynamically load control instance code in XAML in WPF

using System;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
using ;
/*
  * Function: Test the dynamic loading of controls in XAML in WPF
  * and added to the specified child node.
  * Author: Kagula
  * Time: 2012-09-20
  * Environment: VS2008 .NET FRAMEWORK 3.5
  * Reference: [1] "Application=Code+Markup Reading Notes 19"
  * /15123181/viewspace-423015
  * [2] "Pack URIs in Windows Presentation Foundation"
  * /en-US/library/aa970069(v=vs.90)
  */
namespace testXAMLLoad
{
  /// <summary>
  /// Interaction logic for 
  /// </summary>
  public partial class Window1 : Window
  {
    public Window1()
    {
      InitializeComponent();
      //LoadEmbeddedXaml();
      //LoadEmbeddedXaml2();
      LoadEmbeddedXaml3();
    }
    //Load from string    public void LoadEmbeddedXaml()
    {
      Title = "Load Embedded Xaml";
      string strXaml = "<Button xmlns='/winfx/2006/xaml/presentation'" +
        " Foreground='LightSeaGreen' FontSize='16pt' Width='128' Height='32'>" +
        " From String Object!</Button>";
      StringReader strreader = new StringReader(strXaml);
      XmlTextReader xmlreader = new XmlTextReader(strreader);
      object obj = (xmlreader);
      ((UIElement)obj);
    }
    //Load Button control from external file    public void LoadEmbeddedXaml2()
    {
      XmlTextReader xmlreader = new XmlTextReader("d:\\");
      UIElement obj = (xmlreader) as UIElement;
      ((UIElement)obj);
    }
    //Load from resource file    public void LoadEmbeddedXaml3()
    {
      //Build Action = Resource,Do not Copy, no corresponding cs file      Uri uri = new Uri("/",);
      Stream stream =(uri).Stream;
      //FrameworkElement inherits from UIElement      FrameworkElement obj =(stream) as FrameworkElement;
      (obj);
    }
  }
}

<Button xmlns='/winfx/2006/xaml/presentation'
  Foreground='LightSeaGreen'
  FontSize='16pt'
  Width='128'
  Height='32'>
  From File Object!
</Button>