using System;

public class Program

{

    public static void Main()

    {

        var uri = new Uri("http://vidprod2.dev.dsolutions.lv/en/node/58399"); 

         var host = uri.Host;

        var p = host.LastIndexOf(".");

        var domain = host.Substring(p + 1);

        Console.WriteLine(domain);

    }

}