/// <summary>
        /// Display Scene hierarchy in TreeView.
        /// </summary>
        public void SceneHierarchy2Tree()
        {
            var objects = UnityEngine.SceneManagement.SceneManager.GetActiveScene().GetRootGameObjects();

            HierarchyNodes.BeginUpdate();
            HierarchyNodes.Clear();
            foreach (var go in objects)
            {
                HierarchyNodes.Add(Transform2Node(go.transform));
            }
            HierarchyNodes.EndUpdate();

            Tree.Nodes = HierarchyNodes;
        }

        /// <summary>
        /// Create node from transform.
        /// </summary>
        /// <param name="transform">Transform.</param>
        /// <returns>Node.</returns>
        protected TreeNode<TreeViewItem> Transform2Node(Transform transform)
        {
            var item = new TreeViewItem(transform.name);

            var nodes = new ObservableList<TreeNode<TreeViewItem>>();
            foreach (Transform child in transform)
            {
                nodes.Add(Transform2Node(child));
            }

            var node = new TreeNode<TreeViewItem>(item, nodes, nodeIsExpanded: true, nodeIsVisible: transform.gameObject.activeSelf);

            return node;
        }