How can a WPF StackPanel fill vertically from bottom to top?

Question

I need to be able to fill a stackpanel with buttons but the buttons must appear at the bottom of the stackpanel first and populate upwards<

Answer 1

Try putting the StackPanel inside another container (not a StackPanel; maybe a DockPanel) and bottom-aligning it. Then when you populate the buttons, put each new one into the first position.