using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<string> test = new List<string> { "3", "31", "32", "4", "41" };

        List<string> bla = test.OrderBy(b => b).ToList();

​

        foreach(var b in bla){

            Console.WriteLine(b);

        }

​

    }

}