Add the atlastoolkit library control accordion background in Ajax beta 2.0

Some examples are used to learn accordion, but they are fixed from Aspx.
So I want to add pane in accordion from the backend CS file.

Accordionpane newpane1 = new accordionpane ();

Label lheader = new label (); // other controls, such as pane, Div, and table etc, can be defined here.
Lheader. Text = "header of new accordion pane ";
Other attributes of lheader can be set here.

Label lcontet = new label ();
Lcontent. Text = "content of new accordion pane ";
Other attributes of lcontent can also be set here.

Newpane1.headercontainer. Controls. Add (lheader );
Newpane1.contentcontainer. Controls. Add (lcontent );

Accordionid. panes. Add (newpane1); // Add the newly created accordionpane to accordion.