I am trying to use a tree view for a situation where there may or may not be children. When there are no children, the list is effectively flat, and it doesn't look right to see a big space to the left of the items where the expander would go. I tried to set the expander visual style so that the button is collapsed, but it looks like there is a minimum width on the ListRootContainer. Is there any way to do this without replacing the entire control template?