If you set the SelectedIndex after an item is added in the Items or ItemsSource of RadListBox, the selection doesn't work.
To work this around, use the SelectedItem property instead of SelectedIndex.
When the ItemsPanel of the RadListBox is RadWrapPanel and the user press Down/Up key the RadListBox selects always the next/previous item instead of the corresponding item on the next/previous row.
Available in LIB version 2018.1.205, it will be also available in the R1 2018 SP2 Release.
As a workaround, the ScrollingSettingsBehavior.ScrollStep attached property of the RadListBox control can be set to a value equal to that of the Height of the RadListBoxItems. Available in R3 2017 Official Release Version.
Available in R3 2017 Official Release Version.
When the ItemsSource of the control is changed to a new collection the old selected items are cached and if a collection containing the old selected items source is set as ItemsSource the cached items are restored. Make it possible to disabled this functionality per control. Available in the 2017 R1 Release (2017.1.117).
Available with the R3 2016 SP1 release.
Available in LIB version 2016.3.1017, it will be also available in the 2016 R3 SP1 release.
When the ItemsPanel is set to VirtualizingStackPanel which Orientation is set to Horizontal, selecting an item moves it to the rightmost position. Available in LIB version 2016.3.1017, it will be also available in the 2016 R3 SP1 release.
Add SelectedItemsSource property which can be bound to a collection in the view model. In this case when the RadListBox is in Multiple/Extender mode, the selection can be manipulate from the ViewModel.
For example if there are the following items: "Item", "Item 2", "Item 3" when the RadListBox has the focus typing "Item 2" does not highlight the corresponding item in the ListBiox control. Available in LIB version 2016.2.525, it will be also available in the 2016 R2 SP1 release.
Available in LIB version 2016.2.525, it will be also available in the 2016 R2 SP1 release.