public void OpenTestButtonClick(object sender, EventArgs e)
        {
            if (CurriculumnTreeView.SelectedNode != null)
            {
                var selectedNode = (IdendtityNode)CurriculumnTreeView.SelectedNode;

                if (selectedNode.Type == NodeType.Theme)
                {
                    var shifter = new PageShifter(selectedNode.ID);
                    StatisticManager.MarkNotIncludedPages(shifter.NotUsedPages);
                    StatisticManager.MarkUsedPages(shifter.UsedPages);
                    RedirectToController(new OpenTestController
                    {
                        BackUrl       = string.Empty,
                        ThemaId       = selectedNode.ID,
                        CurriculumnId = ((IdendtityNode)selectedNode.Parent.Parent).ID,
                        StageId       = ((IdendtityNode)selectedNode.Parent).ID,
                        PageIndex     = 0,
                        PagesIds      = shifter.GetRequestParameter()
                    });
                }
            }
        }