Unite Arrays

using System;
using System.Collections.Generic;

namespace CollectionsTask5UniteArrays
{
    internal class Program
    {
        static void Main(string[] args)
        {
            string[] worlds1 = { "aaa", "bbb", "ccc", "ddd", "bbb", "yyy" };
            string[] worlds2 = { "ggg", "ee", "dgfd", "bbb", "aaa", "xxx" };
            List<string> allWorlds = new List<string>();

            AddArrayToList(worlds1, allWorlds);
            AddArrayToList(worlds2, allWorlds);

            foreach (string item in allWorlds)
            {
                Console.WriteLine(item + " ");
            }

            Console.ReadKey();
        }

        private static void AddArrayToList(string[] array, List<string> list)
        {
            foreach (string item in array)
            {
                if(list.Contains(item) == false)
                {
                    list.Add(item);
                }
            }
        }
    }
}