I can across this NuGet package that can be installed into any Microsoft NET project for numerical computations, it helps with linear algebra, probability models, random numbers, interpolation, integration, regression, optimization problems and more.
NuGet Packages
Math.NET With C# & cTrader
Math.NET Numerics works very well with C# and related .Net languages using Microsoft Visual Studio.
DiNapoli Stochastic Indicator using Linear Curve check and Polynomial Interpolation, this indicator from ClickAlgo uses the Math.NET libraries.