using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var obj = new Teste();

        for(int i = 0; i <= 8; i++)

        {

            obj.Campos.Add(i);

        }

        obj.Campos.ForEach(x => Console.WriteLine(x));

    }

}

​

public class Teste

{

    public List<int> Campos { get; } = new List<int>();

}