Common - Rare v0.2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication23
{
    class Program
    {
        static void Main(string[] args)
        {
            int size, common=0, rare=0, appearances, appearancesCommon = 1, appearancesRare = 2;
            size = int.Parse(Console.ReadLine());
            int[] arr = new int[size];
            Random rnd = new Random();
            for (int i = 0; i < arr.Length; i++) //sets up array
            {
                int randomNum = rnd.Next(0, 10);
                arr[i] = randomNum;
            }
            for (int i = 0; i < arr.Length; i++)
            {
                appearances = 0;
                for (int k = 0; k < arr.Length; k++) //counts appearances of each number
                {
                    if (arr[i] == arr[k])
                    {
                        appearances++;
                    }
                }
                if (appearances > appearancesCommon)
                {
                    appearancesCommon = appearances;
                    common = arr[i];
                }
                if (appearances < appearancesRare)
                {
                    appearancesRare = appearances;
                    rare = arr[i];
                }
            }
            Console.WriteLine("\nMost common number: {0}. Rarest number: {1}.", common, rare);
        }
    }
}