Notifies an HtmlTextWriter object, or an object of a derived class, that a control is about to be rendered.
Assembly: System.Web (in System.Web.dll)
The HtmlTextWriter class implementation of the method has no functionality. You must override the method in a class derived from HtmlTextWriter to provide your own rendering functionality. For example, in a markup language that might require <p> elements to be rendered immediately ahead of a control, but where the need for the <p> element is determined earlier, you could use the override.
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.