private void UpdateTree()
        {
            View.BeginTreeUpdate();

            if (_project == null || string.IsNullOrEmpty(_project.OriginalPath))
            {
                View.SetTreeRoot(null);
            }
            else
            {
                View.SetTreeRoot(_project);

                foreach (var item in _project.ContentItems)
                {
                    View.AddTreeItem(item);
                }
            }

            View.EndTreeUpdate();
        }