using System;

using NCalc2;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Eval( "2 + 3" );

        Eval( "11 / 3" );

        Eval( "Truncate(11 / 3)" );

​

    }

    private static void Eval( string str )

    {

        Expression e = new Expression(str);

        var result = e.Evaluate();

        Console.WriteLine(str + " = " + result);

    }

}