HiddenField.CreateControlCollection Method ()
Creates an System.Web.UI.EmptyControlCollection object used to indicate that child controls are not allowed.
Assembly: System.Web (in System.Web.dll)
The Control.CreateControlCollection method is normally used to create a System.Web.UI.ControlCollection object for storing the child controls of a Web Server control. In this implementation of the method, an System.Web.UI.EmptyControlCollection collection is always returned to indicate that child controls are not allowed.
Notes to Inheritors:
When extending the HiddenField control, you can override this method to support child controls.
Available since 2.0