This is a .NET library that provides the full set of financial functions from Excel. The main goal for the library is compatibility with Excel, by providing the same functions, with the same behaviour. Note though that this is not a wrapper over the Excel library; the functions have been re-implemented in managed code so that you do not need to have Excel installed to use this library.
Microsoft F#, September 2008 Community Technology Preview
F# is a type-safe, scalable language for the .NET platform that supports both functional and object-oriented programming. This CTP release includes the F# compiler and tools, as well as Visual Studio 2008 integration for F# development.