I'm using a RadLayoutControl on my page to group data into different groups. I like the panel look and wanted to use that. The problem I'm having is I want a certain LayoutControlExpanderGroup to fill in remaining space so that when a window resizes all the groups fill out one row of space. Just wondering if there's similar functionality to the dock panel where I can set the container to LastChildFill="true" and the last container in the dock panel uses up all the remaining space.