When I first started playing around with the WPF DataGrid, it displayed an empty line at the bottom, where a new item could be added to the bound collection.
But at some point it disappeared.
Beyond setting CanUserAddRows to true (which didn't have any visible effect) I didn't investigate it more closely.
But today I decided to give it a shot and started searching for the issue. At first I thought it could be the issue(s) involved with empty collections:
But then it struck me that even for the collections that have content, the empty line at the bottom wasn't present.
Does anyone know what might cause this problem, and what I can do to work around it?