using System;

​

namespace TestConsoleApp

{

    public class Program

    {

        public static void Main(string[] args)

        {

            First first = new First();

​

            // ## FALLA

            /*if (first.Second.Third.Name.IsEmptyOrNull())

            {

                Console.WriteLine("Is NULL V1");

            }*/

​

            // ## FUNCIONA

            if(string.IsNullOrWhiteSpace(first?.Second?.Third?.Name))

            {

                Console.WriteLine("Is NULL V2");

            }

​

            Console.WriteLine("Ok");

        }

    }

​

    public class First

    {

        public Second Second { get; set; }

    }

​

    public class Second

    {

        public Third Third { get; set; }

    }

​

    public class Third

    {

        public string Name { get; set; }

    }

​

​

    public static class ObjectUtils

    {

​

        public static bool IsEmptyOrNull(this Object obj)

        {

            if (obj == null)

                return true;

            if (obj is string)

            {

                if (string.IsNullOrEmpty((string) obj)) return true;

            }

            return false;

        }

    }

}