public static string BubbleSort()
 {
 int[] arr = { 78, 55, 45, 98, 13 };
 int temp;
 for (int j = 0; j <= arr.Length - 2; j++)
 {
 for (int i = 0; i <= arr.Length - 2; i++)
 {
 if (arr[i] > arr[i + 1])
 {
                        temp = arr[i + 1];
                        arr[i + 1] = arr[i];
                        arr[i] = temp;
 }
 }
 }
 Console.WriteLine("Sorted:");
 foreach (int p in arr)
 Console.Write(p + " ");
 Console.Read();
 }