I created a simple custom control that only inherits from the Literal control, and doesn\'t have any extensions yet, code is empty.
Literal
Namespace: CustomControl
The easiest thing to do is to drag-and-drop the Literal.ascx on to the page (if the page is in the same solution) .If the page is another solution, you could add the control to VS toolbox and drag-and-drop the control on the page.