How do I bring an item to the front in wpf?

Question

I simply have two grid on top of one another. Given one state of the world, I want grid A to be on top, given another state of the world, I want grid B to be on top. In the

Answer 1

To whom it may concern:

ZIndex property is 0 by default, so if you have (like me) a Canvas with more than 1 element (>4000 Shapes in my case), all will have ZIndex = 0, so changing the ZIndexes with this method will have no effect.

For this to work, I set the ZIndexes to a known value after creating all the elements, so they can be ordered after.

    int zIndex = 0; 
    for (int i = 0; i < canvas.Children.Count; i++) {
        UIElement child = canvas.Children[i] as UIElement;
        if (canvas.Children[i] is UIElement) Canvas.SetZIndex(child, zIndex++);
    }