windbg break on file open

I have a .net application which I don't have source too. I'm interested in determining what files this application is accessing. I thought that a debugger would be a good way to do this. I work only in the linux world and kn开发者_JAVA技巧ow nothing about windows debuggers. I feel like there should be a way to do this with windbg, I know how I would go about it with gdb but not with windbg. Any help or advice is much appreciated.

If you just want to monitor file system activity for a given process then you won't find anything better than Process Monitor. It does lots more too and it's free from Sysinternals (now Microsoft).

Process Monitor is an advanced monitoring tool for Windows that shows real-time file system, Registry and process/thread activity. It combines the features of two legacy Sysinternals utilities, Filemon and Regmon, and adds an extensive list of enhancements including rich and non-destructive filtering, comprehensive event properties such session IDs and user names, reliable process information, full thread stacks with integrated symbol support for each operation, simultaneous logging to a file, and much more. Its uniquely powerful features will make Process Monitor a core utility in your system troubleshooting and malware hunting toolkit.

Stu is right if you just want to know what files are being accessed. But if you want to know more about debugging .net apps, you can place break points on .net code when you have SOS.dll loaded into windbg. It's more involved than I can describe here, but you can Google windbg and SOS.DLL to find more info. Tess Ferrandez has a great blog that you may find useful, too: http://blogs.msdn.com/b/tess/