just to help other people that could face the same issue:   i did the trick with a recursive inspection of the datagridcontexts, storing somewhere the information on every visible column's detail expansions and re-applying it after reloading. I also had to store current item's position to restore it as well   the use is ...

first of all thank you for your answer, it has been really appreciated    my underlying datasource is a derivate of ObservableCollection           class PersonObservableCollection : ObservableCollection<DisplayRow>   (where DisplayRow is my object model class)   and ...

hello i'm adding a new item to a datasource of a grid (bound via the datagridcollectionsource object), but i'm getting this weird behavior: the new item is displayed, but it's not properly nested in the detail rows, until i re-read the datasource and reassign it to the grid via code  where am I wrong?    thank you