I’m pretty new to Math.Net and I must by now do polynomial multiplication efficiently. What I want to know, to be more precise, is

How to define a polynomial in terms of its coefficients? That is, if A(x) = a0 + a1x + … + aNx^N, how do I tell Math.NET to define/instantiate this?

Having defined two given polynomials A(x) and B(x), how can I get the coefficients of their product C(x) = A(x)*B(x), for use in later computations?
Sorry if this question sounds too naive, but I’ve Googled it befoore and found no simple/satisfactory answer, and I need an answer quickly. Regards.