Hi all,<BR> <BR>In my web app, I have my web forms inheriting from a base class(which in turn is inheriting from system.web.ui.page).<BR>When I go into Design mode for a web form, i get a error stating "The file failed to load in web designer. Please correct the following error, then load it again: Type Abstract "<BR>My web forms have ASP text box controls and a ASP DataGrid cntrol.<BR>Am not able to go into design mode. (Other wise the inheritance stuff works..)<BR> <BR>Any body has a idea about this kinda problem.<BR> <BR>Thanks<BR>Rahul.