I have a solution with 3 projects, one of them being Ex.utils and Ex.Api. Where the .dll of the utils project is referenced in Ex.Api in 'References'. Both compiled in the same .NET version.
When you run the debug, the breakpoint, after countless searches, remains as if it were unavailable.
Have you tried checking if the project you are debugging is marked as primary? When I use more than one project sometimes it happens to me. If I have two web projects in the same solution and debug one and the other is marked as "as startup project" it debug only what is marked.
I hope this is your case! abs.
I've also gone through this, you need to click on the project properties, in the Build tab, click advanced, and in the "Debugging Information" option, leave it as Full.
Try this:
Right-click the break point, then click "Conditions"
Clickthelinkimmediatelyafter"Location:"
Enablecheckbox"Allow the source code to be different from the original".
Maybe solve ...
