How to dynamically add and remove controls within ASPxCallbackPanel on callbacks

This example demonstrates how you can dynamically add and remove controls within an ASPxCallbackPanel on callbacks. In this case, a ViewState is not applied so it should be disabled (the EnableViewState property is set to false). A hierarchy of controls, which have been created on callbacks, should be recreated on Page.Init event.

In this example, tabs with custom content can be dynamically added to an ASPxPageControl on callbacks. In order to recreate a hierarchy of dynamically created controls (within tab pages) the tab information is saved to a Session object.

Additionally, the example demonstrates the usage of ASPxPageControl.TabTemplate property to specify a tab text and a close button.