Visual Studio refuses to build project due to missing assembly reference that isn't missing

Question

I\'m building a c# windows service and has added a couple of assembly references (to other projects of my own) to my project.

I get the following error when I build

Answer 1

Reinstalling packages worked for me.

From the Package Manager Console, run the the following command to reinstall all packages.

update-package -reinstall

You can target a single package with:

update-package PACKAGE_NAME -reinstall