using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        // see https://docs.microsoft.com/en-us/dotnet/api/system.version.compareto?view=net-5.0

        var target = new Version(21,3,0,0);

        var current = Version.Parse("21.3.1");

        Console.WriteLine(target.CompareTo(current));

​

    }

}