John Whitington of Coherent PDF recently announced the availability of a .NET SDK version of their PDF Command Line Toolokit, written in 20,000 lines of cross-compiling OCaml/F#. Here's an excerpt of what he had to say on the F# list:

Thanks for all your help with this project thus far. We’re almost ready to release the .NET SDK version of our PDF Command Line Toolkit, and are looking for feedback....
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Here’s the .msi which installs a demo version of the SDK:

http://www.coherentpdf.com/cpdflib.msi

Installation is covered in Chapter One of the manual, and is simple.

I’m particularly interested in feedback from existing .NET developers, so do take a look, and you can contact us with your suggestions and criticisms either on this list, or by email.