web.config file

Hi,
when i install my web application, is it possible to add a key to web.config file with the value i wanted and then make web.config file to unreachable?

Thank youYou can put this in your web.config and then reference it by:

ConfigurationSettings.AppSettings("myKey")

<appSettings>
 <add key="myKey" value="myValue" />
</appSettings>

yes i know it but i wanted to ask if it is possible to do it in runtime