[StartCode]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp20
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int[] numbers1 = { 5, 2, 3 };
            int[] numbers2 = { 5, 1, 1 };
            HashSet<int> numbersList = new HashSet<int>();
            AddNumbers(numbers1, numbersList);
            AddNumbers(numbers2, numbersList);
            DeleteDuplicateNumber(numbersList);
            ShowNumbers(numbersList);
        }

        static void AddNumbers(int[] numbers, HashSet<int> numbersList)
        {
            for (int i = 0; i < numbers.Length; i++)
            {
                numbersList.Add(numbers[i]);
            }
        }

        static void ShowNumbers(HashSet<int> numbersList)
        {
            foreach (int number in numbersList)
                Console.WriteLine(number);

        }

        static void DeleteDuplicateNumber(HashSet<int> numbersList)
        {
            foreach (var number in numbersList)
            {
                numbersList.Contains(number);
            }
        }
    }
}
[EndCode]