I can't figure out how could I make that a in WPF that some content align to the top, and some to the bottom of the screen. Basically, I want to put two row of content on the top side of the window, and two on the bottom side. Note, I'm a beginner in WPF.

This is how I tried:

```
<StackPanel>
   <StackPanel VerticalAlignment="Top">
       <!-- some code here -->
   </StackPanel>

   <StackPanel VerticalAlignment="Bottom">
       <!-- some code here -->
   </StackPanel>
</StackPanel>

```

But this doesn't work. What's the solution?