Задание 2: Коллекции

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Задание_2_Коллекции
{
    class Program
    {
        public static List<string> CopyStr(string[] s)
        {
            List<string> x = new List<string>();
            foreach (string w in s)
                x.Add(w);
            return x;
        }
        public static List<string> MergeLists(List<string> List1, List<string> List2)
        {
            List<string> MergedList = new List<string>();
            foreach (string word in List1)
                if (!MergedList.Contains(word))
                    MergedList.Add(word);
            foreach (string word in List2)
                if (!MergedList.Contains(word))
                    MergedList.Add(word);
            return MergedList;
        }
        static void Main(string[] args)
        {
            string[] s1 = { "мак", "одуванчик", "лютик", "пион", "мак", "ромашка", "пион", "мак" };
            string[] s2 = { "лютик", "василек", "василек", "роза", "мак" };
            List<string> List1 = CopyStr(s1);
            List<string> List2 = CopyStr(s2);
            List<string> MergedList = MergeLists(List1, List2);
            foreach (string i in MergedList)
                Console.Write(i + " ");
        }
    }
}