Autofac scope in ASP.NET Core appears to differ between middleware

Question

When registering an object with Autofac and resolving in middleware and again in the MVC middleware via a controller, the instance is different. Instances are registered per lifetime scope.

I've popped a repro project here https://github.com/jakkaj/AutofacResolveIssue.

The app sets a value to the IUserService in the middleware, then try to read that value in the ValuesController later.

This same technique worked in older versions of ASP.NET with autofac. Any ideas what's going on?

Answer 1

Okay, so I made the mistake of injecting my dependency in to the constructor of the middleware.

You should inject dependencies into the Invoke.

The entire middleware object is singleton across all app instances!