Query regarding exceptions in c sharp

Have questions about the query, there has been unhandled exception encountered, the question is why even though it is showing the Abort, ignore, and retry dialog, it also displays a complete description of the error?
While we are using the version to make production, we usually only inform us there is application failure and show them the log.

Application Error
Unhandled Exception:
Invalid operation.
System.InvalidOperationException
