Logging off users on a RDP server, if application crashes

We have an Access application running on a remote server.  This server is locked down and opens our application at login.  When they exit the application - it runs the Logoff function and takes them back to their local desktop.  

I have put several functions into the Access application that will allow users to logoff - should an issue occur.  However, I do see a possibility of something going wrong and the user not being able to log out.  The Taskbar/Desktop/TaskManager are all hidden, so if something did get to the point where they were looking at a black screen - they would need someone else to log them off of the server, which is not acceptable.

I was thinking of writing a small c# process, that is triggered by the Access application once it has loaded.  It would pass the process ID the the c# app, which would then monitor the process ID, to see if it's still running.  If not (i.e a crash has taken place), it would log the user off.

Is this a good idea, and as I'm pretty new to c#, does anyone have any pointers (or better suggestions)?