What is the difference between Classic Mode and Integrated Mode in IIS?

Classic Mode in IIS processes requests by using separate pipeline modes for managed and native modules. It allows backward compatibility with older applications that rely on the ISAPI extension framework.

On the other hand, Integrated Mode integrates the ASP.NET runtime within IIS, allowing all modules to run within a single unified pipeline. This mode provides better performance and compatibility with modern ASP.NET applications.

In summary, Classic Mode segregates managed and native modules, while Integrated Mode unifies all modules within the same pipeline, offering improved performance and flexibility for modern web applications.