在WPF Toolkit datagrid中是否有一种方法可以在列标头下面有一个头，但是在第一行的上面?

I looking for a way to create an area that indicates a user is at the top row of the WPF Toolkit datagrid. (Showing the scrollbar scrolled down is not enough for the user). I need something that sticks out and says "this is the top row" basically. Messing with the entities that that the grid is bound to will not work for me because I have several grids with different filters over the same collection of entities. Also this underlying collections is changing while the app is running.I looking for a way to create an area that indi