How to create a BulletDecorator

BulletDecorator myBulletDecorator = new BulletDecorator();
Image myImage = new Image();
BitmapImage myBitmapImage = new BitmapImage();
myBitmapImage.BeginInit();
myBitmapImage.UriSource = new Uri(@"pack://application:,,/images/apple.jpg");
myBitmapImage.EndInit();
myImage.Source = myBitmapImage;
myImage.Width = 10;
myBulletDecorator.Bullet = myImage;
myBulletDecorator.Margin = new Thickness(0, 10, 0, 0);
myBulletDecorator.VerticalAlignment = VerticalAlignment.Center;
myBulletDecorator.Background = Brushes.Yellow;
TextBlock myTextBlock = new TextBlock();
myTextBlock.Text = "This BulletDecorator created by using code";
myTextBlock.TextWrapping = TextWrapping.Wrap;
myTextBlock.HorizontalAlignment = HorizontalAlignment.Left;
myTextBlock.Width = 100;
myTextBlock.Foreground = Brushes.Purple;
myBulletDecorator.Child = myTextBlock;


XAML code:

<BulletDecorator Margin="0,5,0,0">
  <BulletDecorator.Bullet>
    <CheckBox/>
  </BulletDecorator.Bullet>
  <TextBlock
    Width="100" 
    TextWrapping="Wrap" 
    HorizontalAlignment="Left"
    Foreground = "Blue" 
    Margin="5,0,0,0">
    A BulletDecorator with a CheckBox Bullet.
  </TextBlock>
</BulletDecorator>
  <BulletDecorator Margin="0,5,0,0">
    <BulletDecorator.Bullet>
      <TextBox Width="30"/>
    </BulletDecorator.Bullet>
    <TextBlock
      Width="100" 
      TextWrapping="Wrap" 
      HorizontalAlignment="Left"
      Foreground ="Blue" 
      Margin="5,0,0,0">
      A BulletDecorator with a TextBox Bullet.
    </TextBlock>
  </BulletDecorator>
  <BulletDecorator Margin="0,5,0,0">
  <BulletDecorator.Bullet>
    <RadioButton/>
  </BulletDecorator.Bullet>
    <TextBlock
      Width="100" 
      TextWrapping="Wrap" 
      HorizontalAlignment="Left"
      Foreground ="Blue"
      Margin="5,0,0,0">
      A BulletDecorator with a RadioButton Bullet
    </TextBlock>
  </BulletDecorator>