Selection Sort Algorithm Performed On C#

SelectionSort.cs

public int[] SelectionSort(int[] arr)
{
    int n = arr.Length;
    for (int i = 0; i < n - 1; i++)
    {
        int minIdx = i;
        for (int j = i + 1; j < n; j++)
        {
            if (arr[j] < arr[minIdx])
            {
                minIdx = j;
            }
        }
        int temp = arr[minIdx];
        arr[minIdx] = arr[i];
        arr[i] = temp;
    }
    
    return arr;
}