Numbers count - dictionaries

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//Read a list of integers in range [0…1000] and print them in ascending order along with their number of occurrences.
namespace Count_numbers_dictionary
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> numbers = Console.ReadLine().Split(' ').Select(int.Parse).ToList();
            Dictionary<int, int> countNumbers = new Dictionary<int, int>();
            foreach (var number in numbers)
            {
                if (!countNumbers.ContainsKey(number))
                {
                    countNumbers.Add(number, 0);
                }
                countNumbers[number]++;
            }
            countNumbers.OrderBy(i => i.Key);
            foreach (var number in countNumbers.OrderBy(i => i.Key))
            {
                Console.WriteLine($"{number.Key} -> {number.Value}");
            }
        }
    }
}