A process has an exit code, which is the value returned by the main  
function.  You can retrieve it from the Process.ExitCode property once the  
process has exited.

If by "return" you don't really mean "return", but rather than the console  
application writes the exit codes as text to the standard output, then  
instead you can read the standard output by redirecting it.  Again, use  
the Process class to do this (see ProcessStartInfo.RedirectStandardOutput  
and Process.StandardOutput properties).

Pete