How to freeze last column in WPF datagrid ?

I need to freeze last column of the WPF datagrid. When I set the FrozenColumnCount as 1, then it will freeze only leftmost column but I need to freeze right most column. (that means I need to prevent column from moving). How to achieve this? Seems like need to write custom extension. But I don't have any idea of how to do that? Any guidance or advice will be much appreciated!