Thank you for this great work.

I was wondering is there any option of GMRES method in Math.NET Numerics?

Because I have heard that GMRES is very robust method for solving system of linear equations and is usual in CFD code developers.

Also I found the following link which has the same name of your software but more solving methods:

http://nmath.sourceforge.net/doc/numerics/MathNet.Numerics.LinearAlgebra.Sparse.Linear.html