Initializes a filter used for a page.
Assembly: System.Web (in System.Web.dll)
Because the PageParserFilter class does not expose well-defined public constructors, it is initialized by the page parsers that use the method. Override the method to add your own custom initialization steps when an instance of PageParserFilter is created and used by ASP.NET. The virtualPath parameter passed to the method sets the VirtualPath property, and cannot be a null reference (Nothing in Visual Basic).