public static string[] UniqueNames(string[] names1, string[] names2)
throw new NotImplementedException();
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)));