NuGet
Library can be also downloaded from nugetFeatures And Algorithms
This library uses numerical calculator library so can handle same functions at input.To compute integrals library uses ten Gauss–Legendre quadratures. Thanks to this computations are very fast and accurate.
Usage
string formula = "x ^ 3 - cos(x)";
double lowerLimit = -5d;
double upperLimit = 5d;
Integral integral = new Integral(formula, lowerLimit, upperLimit);
double result = integral.ComputeIntegral();
Example application
Download: here