using System;

​

​

public class Program

{

    public static void Main()

    {

        DateTime Nascimento = new DateTime(1975,5,3);

        Console.WriteLine(Nascimento.Anos().ToString());

    }

}

​

    public static  class Extensions

    {

        public static int Anos(this DateTime data)

        {

            return DateTime.Now.Year - data.Year;

        }

    }

​