namespace Maoli.Demo

{

    using System;

    using Maoli;

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Type the CNPJ to validate: ");

            var cnpj = Console.ReadLine();

            var message = Cnpj.Validate(cnpj)

                ? "CNPJ is valid"

                : "CNPJ is invalid";

​

            Console.WriteLine(message);

        }

    }

}