I have grid with e.g. 20 rows. At the beggining  scrollbar is invisible and ActiveRowScrollRegion.ScrollPosition  = 1. Then

a) I resize grid (only 10 rows are visible) -> scrollbar  appears

b) I scroll grid -> ActiveRowScrollRegion.ScrollPosition  = 8 (e.g.)

c) I resize grid (all 20 rows are visible) -> scrollbar  disappears BUT ActiveRowScrollRegion.ScrollPosition  = 8 ???

I have 2 questions:

1)  Why doesn't scrollbar reset it's ScrollPosition value when it disappears ?

2) Is it possible to determine  if scrollbar is visible? (Any scrollbar 's property? )