Visual Studio 2015 project no longer runs in debug mode

Question

This is what I get even when I run in the Debug configuration:

The way I got this to show was by enabling "Just My Code" and warn if there

Answer 1

I tried pretty much everything in this list, but in the end I fixed this by opening the solution properties and switching from "Multiple startup projects" to "Single startup project" and back again.

1. Right-click on the solution and choose "Properties"
2. Under "Common properties" change the selection "Multiple startup projects" to "Single startup project"
3. Click OK
4. Run debugging
5. End debugging and repeat steps 1-3, but switch back to "Multiple startup projects"
6. Run debugging again with multiple projects