Why does Stack Overflow occur only when debugging?

Question

ASP.NET

There is an application on ASP.NET. If you run it on Crl + F5, without debugging, then it works fine
. And if you run it on F5, with debugging, it crashes on Stack Overflow.
Falls on the line with checking the file for existence.

Please, tell me where to dig.
Does the debug mode create such a large load?

Answer 1

Falls on the line with checking the file for existence.

and exactly so?
what happens if you wrap this place in a try-catch?