// 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.UniqueNames(new string[]{'Ava', 'Emma', 'Olivia'}, new string[]{'Olivia', 'Sophia', 'Emma'}) 

// should return an array containing Ava, Emma, Olivia, and Sophia in any order.

​

using System;

using System.Linq;

​

public class MergeNames

{

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

    {

        return names1.Union(names2).ToArray();

    }

    public static void Main(string[] args)

    {

        string[] names1 = new string[] {"Ava", "Emma", "Olivia"};

        string[] names2 = new string[] {"Olivia", "Sophia", "Emma" };

        Console.WriteLine(string.Join(", ", MergeNames.UniqueNames(names1, names2))); // should print Ava, Emma, Olivia, Sophia

    }

}