http://en.wikipedia.org/wiki/List_of_numerical_libraries#.NET_Framework_Languages_C.23.2C_F.23_and_VB.NET[^].

Also, "computational geometry" is not the most used term (http://en.wikipedia.org/wiki/Computational_geometry[^]). Maybe, that was the reason for your failure to find the appropriate libraries. They do exist but are classified in different ways.

It's more likely that you mostly need

*analytic geometry*, and the mathematical apparatus of it is

*linear algebra*, so you should better look for linear algebra features of the libraries first.

See also:

http://en.wikipedia.org/wiki/Analytic_geometry[^],

http://en.wikipedia.org/wiki/Linear_algebra[^].