One issue when hosting the ArcGIS Windows Form Control in a WPF window

[yangzishe]

In my project, I hosted a ArcGIS mapcontrol in a WPF window through WindowsFormsHost.
Everything works great. However, one issue bothers me.

When the window size is not large enough, the window scroll bar shows up as I expected. However, the axMapcontrol displays on the top of the scroll bar, which makes the scroll bar be invisible.

Please advise if there is a solution for this issue.

Thanks!