I have found one small problem.
When you Rightclicked a node, the Context Menu opened correctly and the node is selected.
But when you now right-click an other node the Context Menu opens, but the node is not selected. Stepping through the code you will see, that the MouseRightButtonDown-Event
from the TreeView is not fired.
One solution I have found is to use the Closed-Event
from the Context Menu with this Code:
sender, RoutedEventArgs e)
RadTreeViewItem item = (sender