Is it possible to virtualize a console application's disk access when shelled out from a C# application

Programmer Question

I've got application A which runs application B as a console app. I'd like to write unit tests as part of application A which validate the input to/output from application B, but application B uses hard coded paths to look for some of its inputs. I'd like to be able to run the application, but intercept the call to read from c:\wherever\whatever.txt and provide the contents of that file myself.

Any frameworks or pieces which can do this for me?

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