using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        List<string> commonList = new List<string> 

        {

            "1",

            "2"

        };

        //Change this if you want to see it work in different ways

        Status status = Status.Premium;

        switch (status) 

        {

            case Status.Free:

                List<string> freeList = new List<string>

                {

                    "3",

                    "4"

                };

                commonList.AddRange(freeList);

                break;

            case Status.Premium:

                List<string> premiumList = new List<string>

                {

                    "5",

                    "6"

                };

                commonList.AddRange(premiumList);

                break;

            case Status.Offline:

                List<string> offlineList = new List<string>

                {

                    "7",

                    "8"

                };

                commonList.AddRange(offlineList);

                break;

            default:

                throw new Exception("wrong");

        }

        //instead of this use ElementsToBeVisible

        commonList.ForEach(x => Console.WriteLine(x));

    }

    enum Status

    {

        Free,

        Premium,

        Offline

    }

}