/*

Implement the UniqueNames method. When passed two arrays of names, it will return an array containing the names that appear in either or both arrays. 

The returned array should have no duplicates. 

For example, calling MergeNames.UniqueProducts(new string {'KitKat', 'Buble Gum', 'Olive Oil'}, new string{'Buble Gum', 'Sweet', 'KitKat'}) 

should return an array containing KitKat, Buble Gum, Olive Oil, Sweet in any order. 

*/

​

using System;

using System.Linq;

using System.Collections.Generic;

​

public class MergeProducts

{

    public static string[] UniqueProducts(string[] names1, string[] names2)

    {

        var result = new List<string>();

        var ls = names1.Concat(names2).ToList();

        foreach (var item in ls) {

            if (!result.Any(itm => itm == item)) {

                result.Add(item);

            }

        }

        return result.ToArray(); 

    }

    public static void Main(string[] args)

    {

        string[] products1 = new string[] {"KitKat", "Buble Gum", "Olive Oil"};

        string[] products2 = new string[] {"Buble Gum", "Sweet", "KitKat"};

        Console.WriteLine(string.Join(", ", MergeProducts.UniqueProducts(products1, products2))); // should print KitKat, Buble Gum, Olive Oil, Sweet

        Console.WriteLine(string.Join(", ", products1.Concat(products2).Distinct()));

    }

}