using System;

using System.Linq;

using System.Numerics;

using System.Collections.Generic;

​

public static class Program {

    public static void Main()

    {

        // test values

        List<string> Values123 = new List<string> {

            "123456789012345678901234",

            "-61309282998165063700291",

            "72413799900717492396359",

            "-10076416403816370211636",

            "123191989931658420157210",

            "-675299502697548089298418",

            "554706403711546488433874",

            "-882666356021157245451325",

            "877873677336436172875781",

            "-695217734376922329970499"

        };

​

        // sort the list oin the sortable key

        IEnumerable<string> sorted123 = Values123.OrderBy(v => BigInteger.Parse(v));

​

        // print list

        foreach (string val in sorted123)

        {

            Console.WriteLine(val);

        }

    }

}

​