namespace AnonymousFunctionVsmethodGroup
{
    class Program
    {
        static void Main(string[] args)
        {
            var app = new App();
            app.Run();
            app.Crash();
        }
    }

    public class App
    {
        private Func<string> m_Func;

        public void Run()
        {
            Entity cat = null;

            // Anonymous function. At this point cat is null
            m_Func = () => cat?.GetName();

            // Initializing new cat
            cat = new Entity("Cat");

            // Func is executed on a valid cat
            Console.WriteLine(m_Func());
            Console.Read();
        }

        public void Crash()
        {
            Entity cat = null;

            // Method group. At this point cat is null. Code never gets through here and an exception is thrown instead.
            // "Delegate to an instance method cannot have null this"
            m_Func = cat.GetName;

            // Initializing new cat
            cat = new Entity("Cat");

            // Func is executed on a valid cat?
            Console.WriteLine(m_Func());
            Console.Read();
        }
    }

    // Sample entity
    public class Entity
    {
        private string name;

        public Entity(string name)
        {
            this.name = name;
        }

        public string GetName()
        {
            return name;
        }
    }
}