The UiListBox returns a UiListItem for the SelectedItem while the .NET control returns an object (which can be a data row when bound to a data source).

You can do something similar with SharpUI's UIListBox by matching the index of the SelectedItem to the row in the database. You will need to manually select a specific row from the data source instead of setting the row to the SelectedItem. Then you can access the other rows. Otherwise, only DisplayMember and ValueMember can be accessed.