Updated PropertyGrid to support multi-selection modes.
Updated TreeListBoxItem to become the primary selection when in single selection mode it receives focus.
Added the TreeListBox.IsRootItemVisibleChanged event.
Added a TreeListBoxItemMenuEventArgs.IsBackground property that indicates if a right-click was past the last column in a TreeListView.
Updated right-clicks on selected TreeListBox items when in Multiple selection mode to not deselect.
Improved how TreeListBox items load children to support a lazy-loading scenario.
Improved TreeListBox in multi-selection mode to update TreeListBoxItem selection state when items are added that are pre-selected via an item adapter.
Updated TreeListBox to focus itself if an item currently has focus and its items source is changing.
Updated the tree node expansion logic.
修補程式
Fixed a bug where TreeListBox with a ChildrenQueryModeDefault of OnExpansion wasn't calling the TreeListBoxItemAdapter.CanHaveChildren method properly.
Fixed a bug where merged properties didn't use a custom property editor specified with EditorAttribute.
Fixed a bug where a stack overflow could occur in TreeListBox when working with extremely deep trees.
Fixed a bug where dragging and dropping a TreeListBox item when filtering is active could show the dropped item in the wrong location.
Fixed a bug where changing a TreeListView column width to a star-sized column might not allow it to resize.
Fixed a bug where TreeListView column headers weren't marking clicks as handled.
Fixed a bug where using up/down arrow keys might not work properly in scenarios like the PropertyGrid Dynamic Properties QuickStart.
Fixed a bug where double-clicking a TreeListView column header resize gripper to auto-resize could raise the ColumnTapped event for the next column.
Fixed a bug where removing a TreeListBox item didn't properly mark that tree node as hidden.
Fixed a bug where adding an item to a list in a PropertyGrid with filtering active might not show the filtered items.
Fixed a bug where a selection change might not always scroll the newly-selected item into view properly.