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If you place a RadTreeView on a SL form, then add a RadGridView on the same form. Then create events for OnSelectionChange for the tree, CellEditEnded for the GridView, and LostFocus on the GridView. Now put break points on the events.
When a user is in the grid, makes an edit to the cell, then clicks another leaf on the tree without leaving or committing the cell in the grid. The OnSelectionChange fires first. It should fire last.
When a user is in the grid, makes an edit to the cell, then clicks another leaf on the tree without leaving or committing the cell in the grid. The OnSelectionChange fires first. It should fire last.