Sample code to make arbitrary significant figure calculations using C# MVC, MathNet.Numerics and BigRational.
Based on code from https://kashfarooq.wordpress.com/2011/08/01/calculating-pi-in-c-part-3-using-the-net-4-bigrational-class/ by Kash Farooq. Taken further to work with MathNet.Numerics as available through NuGet, with MVC input and display with unobtrusive AJAX.
Program calculates Pi * Value to arbitrary significant figures.