Square Numbers Linq solution

using System;
using System.Collections.Generic;
using System.Linq;
namespace sad
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> numbers = Console.ReadLine().Split(' ').Select(int.Parse).ToList();

            numbers.RemoveAll(num => Math.Sqrt(num) != (int)Math.Sqrt(num));

            Console.WriteLine(string.Join(" ",numbers.OrderByDescending(x => x)));
        }
    }
}