basic bubble sort

I have an array of 10 elements which makes nine comparisons but i want it to make eight comparisons on the second pass and seven on the third pass etc. Can anyone help please?

 

 private static int[] arr = {17, 3, 9, 15, 7, 32, 21, 99, 10, 5};

{

static void Main(string[] args)

{

Console.WriteLine("Before Sorting: \n");

foreach (int i in arr)

{

Console.Write(i + " ");

}

Console.WriteLine();

BubbleSort();

Console.ReadKey();

}

public static void BubbleSort()

{

int temp;

Console.WriteLine("\nAfter Bubble Sorting: ");

for (int i = 0; i < arr.Length; i++)

{

for (int j = 0; j < arr.Length - 1; j++)

if (arr[j] > arr[j + 1])

{

temp = arr[j];

arr[j] = arr[j + 1];

arr[j + 1] = temp;

}

Console.WriteLine();

foreach (int q in arr)

{

Console.Write(q + " ");

}

}

}

}

}