A project with output type of class library cannot be started directly - with a startup exe

Question

Firstly I\'m completely aware of this message and why it happens normally. It\'s not that I\'m just trying to run a dll (like this question).

I have a project that c

Answer 1

no just make a start up project

Answer 2

I've seen this as well, and it seems like a bug in VS. It happens after you right-click/build a class library (that requires rebuilding), and then right-click/debug > start new instance.

edit- It's still very intermittent, I can't seem reproduce it reliably

Answer 3

I've found that I've had the Startup Project on the Solution set to Current selection, then at some point, I've unloaded a project, and the solution has reverted to Single startup project on a project that happens to be a class library.