951022 - how to get all node of a radtreeview?

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treeview

Telerik

RAD

I don't use a data source for a RadTreeView. Instead, I add and remove the nodes individually. I use OnFilter to specify which nodes to be shown. When some nodes are hidden, in a part of my program, I need the list of ALL nodes including the hidden ones, while Nodes includes just the shown nodes. I investigated and found no property to hold them.

Any idea?

What I have tried:

I tried to find a property like Nodes with name of say AllNodes to hold them. I also tried finding a method like GetAllNodes. but there's not such things.