Quote:
How can i implement microsoft excel GRG Nonlinear solver in c#.net
The way you ask the question is an indication that you lack the necessary skills in computer science and mathematics to complete such a solver by yourself.
You are unable to evaluate the difficulty of such a problem, and difficult it is.
One can bet that MS took years (of man programming) to come up with actual solver. An individual can come up with a rough version rather quickly, but optimization and tweaking take an awful lot of time and involve deep mathematical understanding.
Sorry for the bad news.
http://www.dtic.mil/dtic/tr/fulltext/u2/a009402.pdf[
^]