Thank you for writing.
At the moment RadTreeView changes its selection on mouse right-click and shows the context menu of the selected node. This behavior is not quite right and our team would like to apologize for the caused inconvenience.
I would like to let you know that we decided to create a brand new RadTreeView control designed to replace and extend the functionality of its ancestor. It will introduce new features, greater flexibility, and better performance. For example, one exciting improvement of the new control will be virtualization, which will allow you to load a great number of nodes without any performance concerns. More importantly, it will address all issues introduced in the current RadTreeView including the one you are experiencing. This control is part of our road map and although we cannot guarantee it, we will do our best to introduce it in Q3 2010.
At the moment, the only workaround I can suggest is illustrated in the attached sample project. I hope you will find it useful.
Let me know if I can assist you further.
All the best,
the Telerik team
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