Use the Select Application Pool dialog box to select an application pool for your site or application. An application pool is configured to use one version of the .NET Framework, and one of two modes for processing managed code. Select an application pool that is configured to use the version of the .NET Framework and the managed-processing mode that the site or application requires. If your application does not require the .NET Framework, you can select an application pool that is configured for no managed code.
To add an application pool, use the Add Application Pool dialog box on the Application Pools page.
UI Element List
Select the application pool that you want your site or application to use.
Displays the .NET Framework version and the pipeline mode that the application pool is configured to use.