Best and shortest way to evaluate mathematical expressions

Although using compiler services is a simple and efficient solution, it raises serious security issues if the expression is entered by a user, because it could execute virtually anything.

There's another very simple solution that is much more secure : take advantage of the JScript Eval function. You just need to follow these steps :

Create a js file named JsMath.js :

class JsMath
{
    static function Eval(expression : String) : double
    {
        return eval(expression);
    };
}

Compile it into a class library :

jsc /t:library JsMath.js

Reference the JsMath library in your C# project, and use it like that :

double result = JsMath.Eval(expression);