LexicographSort Integer List

Program.cs

using System;
using System.Collections.Generic;
using System.Linq;

namespace LexicographicSortIntegerList
{
    class Program
    {
        static void Main(string[] args)
        {
            // echo "41 4\n" | dotnet run (Output 441)
            List<int> digits = Console.ReadLine()
                .Split(' ')
                .Select(x => Int32.Parse(x))
                .ToList();

            digits.Sort((a, b) => {
                    int left = Int32.Parse(a.ToString() + b.ToString());
                    int right = Int32.Parse(b.ToString() + a.ToString());

                    return right.CompareTo(left);
            });

            Console.WriteLine(String.Join("", digits));
        }
    }
}