private void InitTreeData()
        {
            this.treeRules.DataContext = null;
            _rootNode = new ObservableCollection <RootNode>();
            _rootNode.Add(
                new RootNode
            {
                Name = "Business Rules"
            });

            _rootNode[0].Nodes = RulesHelper.GetRulesHierarchy();

            this.treeRules.DataContext = _rootNode;
        }