I\'m used from windows forms, that I create a panel, place controls inside it and give them DockStyle.Fill
to max out their size to the surrounding panel.
I
You can do what you want by just saying DockPanel
LastChildFill="True"
and then making sure what you want to be the filler is actually the last child!
The Grid is the beast of a layout that you can make do most anything, but the DockPanel is usually the right choice for your outermost layout panel. Here is an psuedocode example: