HTTP Modules in ASP.NET Request life cycle

HTTP module is a .NET Framework class that implements the IHttpModule interface, they called as ISAPI filter in IIS stack so modules are counterpart in ASP.NET, have ability to intercept and handle system events and other modules events. Based on the web.config file, per application basis, HTTP modules can filter the raw data, the context, within the request. Note: all ASP.NET applications