Cannot Arrange Dockpanel children in wpf

Question

I hosted a wpf control in win form using element host, and want to arrange children elements in wpf and set their docs to fill the form correctly, I tried to use DockPanel.SetDock but set not isn't in dockpanel class, Of course I tried to add system.windows.controls.dockpanel namespace but the only item in list is "primitives" , the PresentationFramework.dll and PresentationCore.dll already were added to references . what should I do for solving this problem ? Thank you!

Answer 1

For my experience DockPanel is always a problem. Place your custom control inside a Grid without vertical and horizontal alignment.