In this topic you will set some of the properties for the C1TreeExtender control.

1. Select View | Properties Window in the Visual Studio menu.
2. Click the drop-down list at the top of the window and select Panel1_TreeExtender.
3. Set the C1TreeExtender.AllowDrag and  C1TreeExtender.AllowDrop properties to True.
4. Set the C1TreeExtender.AutoCollapse property to True. The markup will look like this:

<cc1:C1TreeExtender ID="Panel1_C1TreeExtender" runat="server"

        TargetControlID="Panel1" AllowDrag="True" AllowDrop="True"

        AutoCollapse="True">

</cc1:C1TreeExtender>

Now run the project to see the tree.