I need to solve a problem using Linear programming : simplex method or any algorithm (without using any sort of Libraries) which comes in category of linear code that is :

This is an optimization problem.
• Any solution meeting the nutritional demands is called
a feasible solution
• A feasible solution of minimum cost is called the
optimal solution.

I'm stuck that how do I implement it on C# or Java language .. How do i start quite confused any help will be appreciated.

What's with all the "checking"? Why do you edit the question like that? The point is other people may have a look on your question if they have a similar problem and can read the solutions. This way you are ruining it for everybody else. Please revert it so we can see your question. This would be more appropriate as a comment to the relevant solution.

I've rolled-back your edit.