using System.Linq;

using System;

public class Program

{

    public enum CustomerSpecialTypeID {

        LyonessRoot = 28001,        

        CountryRoot = 28002

    }

    public static void Main()

    {

        CustomerSpecialTypeID? test2 = null;

        CustomerSpecialTypeID? test = test2.GetValueOrDefault();

        if (test.HasValue) {

            Console.WriteLine("Has val");

            Console.WriteLine("Val is " + test);

        }

        else {

            Console.WriteLine("no val");

        }       

    }

}