WPF Image stretch to fill doesn't stretch to the bounds of it's parents

Question

Here\'s my XAML and how it looks like:

Answer 1

The problem is that you have the images within a canvas. Basically, any time you put an element in a Canvas panel, you are disregarding the entire layout system. Elements within a canvas do not participate in layout at all. What you want to do is replace the Canvas element with a plain Grid element (you don't need to define rows or columns, it will default to a single row/column.)

EDIT

And actually looking more closely at what you are trying to do, you'll need to make some slight tweaks. Try this.