c# - How do I set AppSettings in an ASPX project's Configuration manager -

this aspx/cs project visual studio 2010. configuration manager question.

i debugging (sort of) code being used on server. there piece of code plays url in live version should not used in debug/localhost version.

 protected void page_load(object sender, eventargs e)     {         if (configurationmanager.appsettings["istesting"] == "false" && request.url.tostring().contains("http:"))         {             response.redirect(request.url.tostring().replace("http:", "https:"));         }          loadmastertemplate();     } 

this piece of code lands on "response.redirect...." line when should not because "istesting" app setting should set true in configurationmanager . how set that?

inside <configuration> element in app/web.config file, there should (or should create) <appsettings></appsettings> tag, , individual settings bit this:

<appsettings>   <add key="newkey0" value="something1" />   <add key="newkey1" value="something2" /> </appsettings>