class Program
    {
        static int[] someArray = new int[] { 6777, 6666, 6653, 6666 };
        static void Sort(int[] array)
        {
            for (int i = 0; i < array.Length; i++)
            {
                if (array[i] > array[array.Length - 1])
                {
                    int temp = array[i];
                    array[i] = array[array.Length - 1];
                    array[array.Length - 1] = temp;
                }
            }
            foreach (var item in array)
                Console.WriteLine(item);
            Console.ReadKey();
        }
        static void Main(string[] args)
        {
            Sort(someArray);
        }
    }