Quicksort In-Place Solution in c#

QuicksortInPlace.cs

using System;
using System.Collections.Generic;
using System.IO;
class Solution {
    static void Main(String[] args)
    {
            int N = Convert.ToInt32(Console.ReadLine());
            string[] arr_temp = Console.ReadLine().Split(' ');
            int[] list1 = Array.ConvertAll(arr_temp,Int32.Parse);
            Solution.quickSortInPlace(list1);
        /* Enter your code here. Read input from STDIN. Print output to STDOUT. Your class should be named Solution */
    }
    
    public static void quickSortInPlace(int[] a) 
        {
            quickSortInPlace(a, 0, a.Length - 1);

        }

        public static void quickSortInPlace(int[] a , int first, int last) 
        {
            if((last - first) >= 1)
            {
                int pivotposition = partition(a, first, last);
                print(a);
                quickSortInPlace(a, first, pivotposition - 1);
                quickSortInPlace(a, pivotposition + 1, last);
            }
            
        }

        public  static int partition(int[] a, int first, int last)
        {
            int pivot = a[last];
            int wallindex = first;
            for(int currentindex  = first; currentindex  < last; ++currentindex )
            {
                if(a[currentindex] < pivot)
                {
                    swap(a, wallindex, currentindex);
                    ++wallindex;
                }
            }
            swap(a, wallindex, last);
            return wallindex;

        }

        private static void print(int[] a) 
        {
            //Console.WriteLine(" ");
            foreach(int element in a)
            {
                print(element);
            }      
            Console.WriteLine(" ");
        }

        public static void swap(int[] a, int indexA, int indexB)
        {
            int temp = a[indexA];
            a[indexA] = a[indexB];
            a[indexB] = temp;
        }
        private static void print(int element) 
        {
            //Console.WriteLine(" ");
            Console.Write(Convert.ToString(element) + " ");
            
        }
}