The C# equivalent for Java System.exit(0) is −
The Environment.Exit() method terminates this process and returns an exit code to the operating system.
Above, use exitCode as 0 (zero) to show that the process completed successfully.
Use exitCode as a non-zero number to show an error, for example −
Return a value 1 to show that the file you want is not present
Return a value 2 to indicate that the file is in an incorrect format.