title: Remove elements from stackpanel
body: <p>I have a button, when pressed it adds a textbox and a listbox to a stackpanel and adds this stackpanel to another stackpanel named "stackPanelAdd". Just like this:</p>
  
  <pre><code>private void buttonAdd_Click(object sender, RoutedEventArgs e)
  {
      StackPanel sp = new StackPanel();
      TextBox tb = new TextBox();   
      ListBox lb = new ListBox();
  
      tb.Margin = new Thickness(5, 5, 5, 0);
      lb.Margin = new Thickness(5, 5, 5, 0);
      lb.Height = 200;
  
      sp.Children.Add(tb);
      sp.Children.Add(lb);
  
      stackPanelAdd.Children.Add(sp);
  }
  </code></pre>
  
  <p>How do I remove the last children in the stackpanel "stackPanelAdd"?
  Should I use something like stackPanelAdd.children.Remove? if so then how do i get the last element in the stackpanel?</p>