selectionSort.cs

  public static void doSelectionSort(int[] arr)
  {
    for (int index = 0; index < arr.Length; index++)
    {
      var minIndex = index;
      var item = arr[index];
      for (int j = index; j < arr.Length; j++)
      {
        if (arr[minIndex] > arr[j])
        {
          minIndex = j;
        }
      }

      arr[index] = arr[minIndex];
      arr[minIndex] = item;
    }
  }