using System;

using System.Linq;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        int[] nums1 = {61,24,20,58,95,53,17,32,45,85,70,20,83,62,35,89,5,95,12,86,58,77,30,64,46,13,5,92,67,40,20,38,31,18,89,85,7,30,67,34,62,35,47,98,3,41,53,26,66,40,54,44,57,46,70,60,4,63,82,42,65,59,17,98,29,72,1,96,82,66,98,6,92,31,43,81,88,60,10,55,66,82,0,79,11,81};

        int[] nums2 = {5,25,4,39,57,49,93,79,7,8,49,89,2,7,73,88,45,15,34,92,84,38,85,34,16,6,99,0,2,36,68,52,73,50,77,44,61,48};

        List<int> r =new List<int>();

        var inter = nums1.Intersect(nums2);

        Dictionary<int,int> dict = new Dictionary<int,int>();

        foreach(var v in inter.ToArray())

        {

            dict.Add(v,nums1.Count(x=>x.Equals(v)));

        }

        foreach(var v in inter.ToArray())

        {

            for(var i=0 ;i<nums2.Length ; i++)

            {

                if(v==nums2[i] && dict[v]>0)

                {

                    r.Add(v);

                    dict[v]--;

                }

            }

        }

        foreach(var v in r.ToArray())

        {

            Console.Write(v+",");

        }

​

        //Console.WriteLine(q.ToArray().Length>k.ToArray().Length?q.ToArray():k.ToArray());

    }

}