Yesterday I had an interesting experience, the web that we develop  suddenly became not responding. We predicted that this is because either database locking or too may request.

It turned out that an assertion from 3rd party library (PdfSharf) failed! So we need to click OK in web server pc first, then web continued as usual.

Honestly, I’ve never used Debug.Assert to check the state of my code, so this behavior surprises me.

It is a good practice to use the release version of 3rd party library.