using System;

using System.Collections.Generic;

public class Program

{

    public static void Main(string[] args)

    {

        TestClass a = new TestClass()

        {

            // What is the name for this feature??

            List =

            {

                0,

                10,

                20,

                30

            }

        };

        Console.WriteLine(a.List.Count);

    }

    public class TestClass

    {

        private List<int> _list = new List<int>();

        public List<int> List { get { return _list; } }

    }

}