EnableSessionState, ASP.NET most common error

Session state can only be used when enableSessionState is set to true, either in a configuration file or in the Page directive. Please also make sure that System.Web.SessionStateModule or a custom session state module is included in the <*configuration*>*\**\*<*httpModules*> section in the application configuration.

When you'll encounter this kind of error? This occur when u are using state in your ASP.NET pages. For instance, you might be using

Session["Username"] = "Carso Owen"; //in your c# code

The solution is you need to do these 3 things in your ASP.NET web.config:

1. locate under the <*system.web*> <*sessionState mode = "InProc"/*> ... <*/system.web*>

2. modify the <*httpModules*><*add name="session" type="System.Web.SessionState.SessionStateModule"/*>

3. modify <*pages enableSessionState="true" */>

P/s : plz ignore the those * in the above.