using System;

using System.Collections.Generic;// List type

​

//testar extensions )nao rodou ainda

​

public class Program

{

    public static void Main()

    {       

        ai.extensionX();

        System.Threading.Tasks.Task Task = null; 

    }

}

​

public class Iterator

{

    float Number_;

    Iterator(List<string> Ticker)//constructor

    {

        Console.WriteLine("Constructor");

    }

}

​

public class car

{

}

​

​

​

public static class ai {

    public static void extensionX()

    {

        Console.WriteLine("Extension");

    }

}