SQLPLUS Script Needs To Exit On Completion

I have a series of sql files that I need to execute via sqlplus. What I do need is to immediately exit the sqlplus instance upon completion of the script. Now, I am not using a batch file, nor a file containing script files where I can add the EXIT command.

I have to effectively run each script from the command line as such:

sqlplus user/pass@server @c: empsomedirsomeScript.sql

Now this works, but once it runs the SQLPlus window is still open. Now I have an event handler (in a c# wrapper) that is supposed to fire once the process terminates...but of course, this even never fires since the sqlplus process doesn't terminate after running the script.

Is there any any any any way to get sqlplus to run this script and then self-exit??

I have no control of the sql script and cannot edit them to include an EXIT command. I need to run them as is.