Programming Tutorials

  The most formidable barrier to migrating legacy ASP.NET MVC applications to .NET 8 is not the syntax changes or the project file format; it is the architectural dependency on   System.Web.dll . Specifically, enterprise applications built between 2010 and 2018 often treat  HttpContext.Current  as a global singleton, accessing request data, session state, and user identity deep within business logic layers, static helper methods, and repositories. When you target .NET 8,  System.Web  disappears. The modern  Microsoft.AspNetCore.Http.HttpContext  is designed to be injected via Dependency Injection (DI), not accessed statically. Rewriting hundreds of thousands of lines of code to thread  IHttpContextAccessor  through every method signature is rarely feasible for an initial migration. This post details how to implement the  System.Web Adapters , a library maintained by Microsoft that creates a compatibility layer, allowing you to run l...