using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var mylist = new MyList<int>

        {

            1, 2, 3, 4, 5

        };

        var othermylist = mylist.GenerateSubList();

        Console.WriteLine(string.Join(",", othermylist));

    }

}

​

public class MyList<T> : List<T>

{

    public MyList()

    {

    }

​

    private MyList(IEnumerable<T> items)

    : base(items)

    {

    }

​

    public MyList<T> GenerateSubList()

    {

        return new MyList<T>(this.Where(x => true));

    }

}