So I was looking for a way to add a scrollbar for my Scrollview Stackpanels.
I used this example: https://github.com/fusetools/fuse-samples/tree/master/Samples/Controls/Scrollbar
And it worked relatively fine, except the scrollbar is not limited to the parent/panel in which it is located. If I use the example exactly when the Scrollview is scrolled down the scrollbar goes outside the bounds of the panel which contains it.
Also I don`t really see what is the use of the anchor property for the scrollbar in this example.