static void bubble_sort(int[] unsorted)        {            for (int i = 0; i < unsorted.Length; i++)            {                for (int j = i; j < unsorted.Length; j++)                {                    if (unsorted[i] > unsorted[j])                    {                        int temp = unsorted[i];                        unsorted[i] = unsorted[j];                        unsorted[j] = temp;                    }                }            }        }        static void Main(string[] args)        {            int[] x = { 6, 2, 4, 1, 5, 9 };            bubble_sort(x);            foreach (var item in x)            {                Console.WriteLine(item);            }            Console.ReadLine();        }