using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        if (list3?.Any())

        {

        }

        var list1 = new List<string>() {"a" };

        var list2 = new List<string>(); 

        List<string> list3 = null;

        Console.WriteLine("--------- Type ------------");

        Console.WriteLine((list1?.Any()).GetType());

        Console.WriteLine((list2?.Any()).GetType());

        Console.WriteLine((list3?.Any())?.GetType());       

        Console.WriteLine("--------- Has Value ------------");

        Console.WriteLine((list1?.Any()).HasValue);

        Console.WriteLine((list2?.Any()).HasValue);

        Console.WriteLine((list3?.Any()).HasValue);

        Console.WriteLine("--------- != true ------------");

        Console.WriteLine(list1?.Any() != true);

        Console.WriteLine(list2?.Any() != true);

        Console.WriteLine(list3?.Any() != true);

    }

}