Legacy ASP.NET

Trigger On

• working in Web Forms, legacy MVC, or classic ASP.NET applications
• reviewing old IIS-centric configuration and lifecycle behavior
• planning migration toward ASP.NET Core without breaking core business flows

Workflow

1. Treat classic ASP.NET as a distinct stack with different hosting, lifecycle, and configuration rules from ASP.NET Core.
2. Stabilize behavior first: routing, session, auth, server controls, configuration transforms, and deployment assumptions.
3. Plan modernization in seams: isolate domain and service logic, then move replaceable edges instead of rewriting the whole app at once.
4. Use dotnet-wcf or dotnet-entity-framework6 when the legacy app depends on those subsystems rather than flattening them into generic web work.
5. Be careful with guidance copied from ASP.NET Core because middleware, DI, and hosting assumptions do not transfer directly.
6. Validate in an environment that resembles real IIS and configuration transforms.

Deliver