How to get the BindingSource to get the most current data in Entity framwork.

The only way you can get that done automaticly is by creating a trigger which then calls some code you put together, which in turn tells your applications that a row were inserted/updated/deleted. But that's extremely messy and doesn't scale well.

What I personally like to dom in cases when I have a list that is often used and updated from different sources, is to place a refresh button so the user can force a refresh of the data. And I update the list when the user navigates to the view with the list, with some throttling, so the list is not refreshed 5 times in 10 seconds because the user works fast.

So in your case I suggest you query the database when the user clicks refresh or navigate to your view.