2014-10-26-Null-propagator-operator

2014-10-26-Null-propagator-operator.md

Snippets for http://fagner.co/2014/10/26/Null-propagator-operator/

null-propagator-operator.cs

using System;
using System.Collections.Generic;

namespace NullPropagator
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Bear b = new Bear { Claws = 2, Friends = new List<Bear>() { new Bear() } };

            Console.WriteLine("Claws: " + b.Claws);

            int? countFriends = b?.Friends?.Count;
            if (countFriends.HasValue && countFriends > 0)
            {
                Console.WriteLine("Friends: " + countFriends);
            }
            else
            {
                Console.WriteLine("The bear has no friends.");
            }
            Console.Read();
        }
    }

    public class Bear
    {
        public int Claws { get; set; }
        public List<Bear> Friends { get; set; }
    }
}