// Test Array class.
public static void Main(string[] args)
{
    int[] a = {5, 2, 7, 4, 5};
    Console.WriteLine(a.GetLength(0));
    Console.WriteLine(a.GetUpperBound(0));
    Array.Sort(a);
    for (int i = 0; i <= 4; i++)
    {
        Console.Write(a[i] + " ");
    }
    Console.WriteLine();
    Array.Reverse(a);
    for (int i = 0; i <= 4; i++)
    {
        Console.Write(a[i] + " ");
    }
    Console.WriteLine("\n");

    int[] b = {2, 4, 6, 4, 5 };
    Console.WriteLine(b.GetValue(2));
    b.SetValue(10, 3);
    for (int i = 0; i <= 4; i++)
    {
        Console.Write(b[i] + " ");
    }
    Console.WriteLine("\n");

    string[] c = { "atlanta", "chicago", "denver", 
                    "los angeles", "memphis", "seattle" };
    Console.WriteLine(Array.BinarySearch(c, "memphis"));

    Console.ReadLine();
}