根据TreeView SelectedItem在视图之间切换

i can't find a solution to this problem. i have a treeview, and i'm trying to get to the point where i'm clicking/double clicking and it opens a view on a different part of the window(lets say using a gridsplitter and the tree is on the right and the relevant view will open on the left by setting the contentcontrol content DP).i can't find a solution to this problem. i have