TreeView и обработка события SelectedNodeChanged

    protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
    {
        Response.Write("It's work!");
    }

        TreeNodeBindingCollection bindings = TreeView1.DataBindings;
        TreeNodeBinding nameProperty0 = new TreeNodeBinding();
        TreeNodeBinding nameProperty1 = new TreeNodeBinding(); 
        TreeNodeBinding nameProperty2 = new TreeNodeBinding();
        TreeNodeBinding nameProperty3 = new TreeNodeBinding();
 
        nameProperty0.Depth = 0;    // all tags with 0 level hierarchy
        nameProperty1.Depth = 1;    // all tags with 1 level hierarchy
        nameProperty2.Depth = 2;    // all tags with 2 level hierarchy
        nameProperty2.Depth = 3;
        
        nameProperty0.SelectAction = TreeNodeSelectAction.Select;
        nameProperty1.SelectAction = TreeNodeSelectAction.Select;
        nameProperty2.SelectAction = TreeNodeSelectAction.Select;
        nameProperty3.SelectAction = TreeNodeSelectAction.Select;
        
        nameProperty0.ValueField = "Name";
        nameProperty1.ValueField = "Name";
        nameProperty2.ValueField = "Name";
        nameProperty3.ValueField = "Name";
        
        bindings.Add(nameProperty0);
        bindings.Add(nameProperty1);
        bindings.Add(nameProperty2);
        bindings.Add(nameProperty3);
    }