- Open the Property builder, add some nodes and disable them.
- There is no way to enable them at design time.
Disable the nodes at runtime.
Download the Treeview from RadTreeview Properties and export as XML.
Edit XML and add Enabled="true" into the node string. Once you apply it will be enabled again.
The issue is pretty complex. For the time being, we cannot provide a fix for it.
Pretty disappointing that this is still an issue after all this time.