BackgroundWorker is dimmed in toolbox- what is wrong in my web solution?
10:57 21 Jun 2026

Is it possible to use the BackgroundWorker in an asp.net web application? I am using VisualStudio2019 and framework 3.7.2. to make a web project with vb.net. The BackgroundWorker and all other items in Tools/components are dimmed out.

I am beginning to think it is impossible - maybe must be net.core?

Been struggling looong time without finding what I am doing wrong. Hope someone can put me on track.

visual-studio aspx-user-control