ControlAdapter.BeginRender Method (HtmlTextWriter)
Called prior to the rendering of a control. In a derived adapter class, generates opening tags that are required by a specific target but not needed by HTML browsers.
Assembly: System.Web (in System.Web.dll)
Notes to Inheritors:
When you inherit from the ControlAdapter class, the base method calls the BeginRender method. Thus, overrides of the method should call the base method only if its processing is in addition to, rather than instead of, the HtmlTextWriter.BeginRender method.
Available since 2.0