Quicksort in descending order c# (No built in sort functions)

Question

So I have implemented a quicksort algorithm :

 public static void Quick_Sort(int[] data, int left, int right,int dataSet)
{
    int i = left, j = right;
    int pivot, temp;
    dataSet tempSet;
    pivot = data[(left + right) / 2];
    do
    {
        while ((data[i] < pivot) && (i < right)) i++;
        while ((pivot < data[j]) && (j > left)) j--;
        if (i <= j)
        {
            //First change the data Array
            temp = data[i];
            data[i] = data[j];
            data[j] = temp;
            //Then change the dataSet array
            if (dataSet == 1)
            {
                tempSet = Program.set1Data[i];
                Program.set1Data[i] = Program.set1Data[j];
                Program.set1Data[j] = tempSet;
            }
            else if (dataSet == 2)
            {
                tempSet = Program.set2Data[i];
                Program.set2Data[i] = Program.set2Data[j];
                Program.set2Data[j] = tempSet;
            }
            else if (dataSet ==3)
            {
                tempSet = Program.bothSetData[i];
                Program.bothSetData[i] = Program.bothSetData[j];
                Program.bothSetData[j] = tempSet;
            }

            i++;
            j--;
        }
    } while (i <= j);
    if (left < j) Quick_Sort(data, left, j,dataSet);
    if (i < right) Quick_Sort(data, i, right,dataSet);
}

And I'm wondering how to quicksort it in descending order. Now, I actually need to sort the array, I can't just use something like Array.Reverse() to get my desired result. Many Thanks.

---

EDIT I've change it to : while ((data[i] > pivot) && (i > right)) i++; while ((pivot > data[j]) && (j < left)) j--;

Following Mhd's suggestion and it now works as desired.

Answer 1

Just change:

while ((data[i] < pivot) && (i < right)) i++;
while ((pivot < data[j]) && (j > left)) j--;

to:

while ((data[i] > pivot) && (i < right)) i++;
while ((pivot > data[j]) && (j > left)) j--;