inline an image into XAML

void Window1_Loaded(object sender, RoutedEventArgs e)

{

this.Title="yoohoo";

TextBox tb = new TextBox();

tb.Text="hello world";

StackPanel sp= this.Content as StackPanel;

sp.Children.Add(tb);

Image myImage3 = new Image();

BitmapImage bi3 = new BitmapImage();

bi3.BeginInit();

bi3.UriSource = new Uri("test.PNG", UriKind.Relative);

bi3.EndInit();

myImage3.Stretch = Stretch.Fill;

myImage3.Source = bi3;

sp.Children.Add(myImage3);

}