using System;

using System.Collections.Generic;

​

public struct Test {

    public string Version;

}

​

public class Program

{

    public static readonly List<Test> versions = new() {

        new Test() { Version = "1.0.0a" },

        new Test() { Version = "24.2.0a" },

        new Test() { Version = "a1.22.21" },

        new Test() { Version = "1.0.1" },

        new Test() { Version = "1.1.0" },

        new Test() { Version = "1.10.0" },

        new Test() { Version = "2.0.0" },

        new Test() { Version = "1.5.1" },

        new Test() { Version = "2.0.1" },

        new Test() { Version = "1.0.0" },

        new Test() { Version = "2.0.1.1" },

        new Test() { Version = "1.0.0.0" },

    };

    public static void Main()

    {

        versions.Sort((Test a, Test b) => {

            if (string.IsNullOrEmpty(a.Version))

            {

                return -1;

            }

            if (string.IsNullOrEmpty(b.Version))

            {

                return 1;

            }

            return a.Version.Replace(".", "").CompareTo(b.Version.Replace(".", ""));

        });

        foreach (Test test in versions) {

            Console.WriteLine(test.Version);

        }

    }

}