Thank you for writing.
I am not exactly sure of the version you are using. You can try handling the SelectedNodeChanging
events and keep track of track of the selected nodes. At the same time you would be able to change the required back color:
sender, RadTreeViewEventArgs e)
first = second;
second = e.Node;
sender, RadTreeViewCancelEventArgs e)
second.BackColor = Color.Red;
first.BackColor = Color.Empty;
I hope this helps. Please let me know if you need further assistance.
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