using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

   public static List<int> FindNonCommonElements(int[] array1, int[] array2)

    {

        try

        {

            // Find elements that are in either array but not in both

            var nonCommonElements = array1.Except(array2)

                                        .Concat(array2.Except(array1))

                                        .ToList();

            return nonCommonElements;

        }

        catch (Exception ex)

        {

            Console.WriteLine($"An error occurred: {ex.Message}");

            return new List<int>();

        }

    }

    public static List<int> FindMissingElements(int[] firstArray, int[] secondArray)

    {

            var uniqueElements = firstArray.Except(secondArray)

                                 .ToList();

            return uniqueElements;

    }

    public static void Main()

    {        

        int[] array1 = { 1, 2, 3, 4, 5, 6 };

        int[] array2 = { 3, 4, 2 };

​

        // Using LINQ method

        List<int> nonCommon = FindMissingElements(array1, array2);

        Console.WriteLine("Unique elements (LINQ): " + string.Join(", ", nonCommon));

     // Example arrays

        int[] array11 = { 1, 2, 3, 4, 5 };

        int[] array22 = { 4, 5, 6, 7, 8 };

​

        // Using LINQ method

        List<int> nonCommonBoth = FindNonCommonElements(array11, array22);

        Console.WriteLine("Non-common elements (LINQ): " + string.Join(", ", nonCommonBoth));

        // Output: 1, 2, 3, 6, 7, 8

        Console.WriteLine("Hello World");

    }

}