- Get latest code from Source Control
- Run iisreset to reset IIS if you are using IIS.
- Attach to the appropriate IIS instance (or all of them).
- Add a breakpoint and run your application.
Some more ideas if the above doesn't work:Check where your dll is being referenced from and ensure that is the code you're trying to debug.
Check you are in the correct mode when building: Debug/Release as they may put the dlls in different places.
Are you attached to the correct process?
If it's not in the list, try running the code anyway. Sometimes even though it says the breakpoint will not be hit, it's only because the dll is not loaded until you enter a scenario that needs it. Try the scenario that depends on the dll, and it may just hit the breakpoint anyway.
Restart your browser. You might have something cached from an older dll.