Hi, I am adding two controls at run time in DockableGroupPane and then adding that in DockManager. I am getting the result as below

Which is correct behavior. BUT when I add only single control the dockmanager does not create a single tab, instead it does not create any tab. Please refer the below image

Can someone please let me know how can I achieve single tab if I add only 1 control and two tabs if I add 2 controls. Below is the code I am using to add

  private void Form1_Load(object sender, EventArgs e)

        {

            SuspendLayout();

      DockableControlPane dcpTreeView =

              new DockableControlPane("tree", "Tree View", this.treeView1);

            DockableControlPane dcpListView =

              new DockableControlPane("list", "List View", this.listView1);

    DockableGroupPane dgpTreeList = new DockableGroupPane();

            dgpTreeList.ChildPaneStyle = ChildPaneStyle.TabGroup;

            dgpTreeList.Panes.Add(dcpTreeView);

            dgpTreeList.Panes.Add(dcpListView);

    DockAreaPane dapLeft = new DockAreaPane(DockedLocation.DockedLeft);

             dapLeft.Panes.Add(dgpTreeList);

              this.ultraDockManager1.DockAreas.Add(dapLeft);

            ResumeLayout();

        }