Connection string, Web.config, App settings..

Jun 9 2011 1:16 AM

what is post back?

what is ispostback?

with out web.config we can run the application or not?if run how?if not why?

what is web.config?

why connection string not write in page_load?why write in web.config?

what is app settings in web.config?

what is diff b/w app settings and connection string in web.config

please give me the relevent answer and clear explanation