using System.Collections.Generic;
public static void Main()
string[] cars = {"Volvo", "Mazda", "BMW", "Ford", "Mazda", "Toyota", "Jetta", "Toyota"};
while (index < cars.Length)
string value1 = cars[index];
Console.WriteLine(value1);
Console.WriteLine("\n+++++++\n");
var dedupedCars = new SortedSet<string>(cars);
Array.Clear(cars, 0, cars.Length);
dedupedCars.CopyTo(cars);
while (index2 < cars.Length)
string value2 = cars[index2];
Console.WriteLine(value2);