static void AddPropertiesAndItems(TimedNode root, List <TreeNode> roots) { Folder properties = root.FindChild <Folder>(Strings.Properties); if (properties != null) { roots.Add(properties); } Folder items = root.FindChild <Folder>(Strings.Items); if (items != null) { roots.Add(items); } var reassignments = root.FindChild <TimedNode>(Strings.PropertyReassignmentFolder); if (reassignments != null) { roots.Add(reassignments); } }