interpret account in string C#

Question:

hello, I needed to resolve a string with an account (ex. 2 + 2) in C# and return an integer (ex. 4)

static void Main(string[] args)
{
    string str = "2 + 2";
    int resultado = Calcular(str);
    Console.WriteLine("Resultado => {0}",resultado);
    Console.ReadLine();
}

any tips?

Answer:

The NCalc library simplifies this for you. Install it from Nuget:

Install-Package ncalc

Then use it like this:

using NCalc;
using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string str = "2 + 2";
            var expressao = new Expression(str);
            Console.WriteLine("Resultado => {0}", expressao.Evaluate());
            Console.ReadLine();
        }
    }
}