Other people are having problems running a program I wrote in C#. I would debug the thing myself to identify the problem, but I'm not getting any error on my end, so I'm not sure what's causing it. If anyone immediately recognizes this kind of error, PLEASE tell me what's causing it.

This is the error report they're getting:
I made sure to have them download the .NET framework and the latest version of DirectX. At first I thought the program might not be able to find some of the files (.txt documents and images) for whatever reason, but those throw different error messages.

Again, I realize that this isn't a whole lot of information, but it's all I really know about the problem myself, and I can't even identify a pattern in all the PCs the program doesn't work on. The only other thing I know is that the error message occurs as soon as the .exe file is run (before the window even pops up).

If anyone recognizes this problem from somewhere else or otherwise has an idea on how to figure out what's wrong, please tell me.