Anyone used this: http://msdn.microsoft.com/en-us/library/ff524509%28v=vs.93%29.aspx

Can't think of a reason I need it at the moment but it looks like fun. Couple of usage examples here:

http://msdn.microsoft.com/en-us/magazine/dn759446.aspx

http://flo.livezon.com/2013/02/how-and-why-use-microsoft-solver-foundation-for-net/