Делегаты и события, задание 2, черновик

using System;

namespace Task2
{
    class Person
    {
        public string Name { get; }

        public Person(string name)
        {
            if (string.IsNullOrEmpty(name))
                throw new ArgumentException("Имя не может быть пустым или null!");

            Name = name;
        }

        public void SayHiTo(object sender, OfficeEventArgs e)
        {
            string name = e.Name;
            DateTime timeOfDay = e.Time;

            if (timeOfDay.Hour < 12)
                Console.WriteLine($"'Доброе утро, {name}!', — сказал {Name}");
            else if (timeOfDay.Hour < 17)
                Console.WriteLine($"'Добрый день, {name}!', — сказал {Name}");
            else
                Console.WriteLine($"'Добрый вечер, {name}!', — сказал {Name}");
        }

        public void SayByeTo(object sender, OfficeEventArgs e)
        {
            Console.WriteLine($"'До свидания, {e.Name}!', — сказал {Name}");
        }
    }

    class Office
    {
        public delegate void OfficeHanler(object sender, OfficeEventArgs e);

        public event OfficeHanler PersonCame;
        public event OfficeHanler PersonLeft;

        protected virtual void OnPersonCame(object sender, OfficeEventArgs e)
        {
            OfficeHanler handler = PersonCame;
            handler?.Invoke(this, e);
        }

        protected virtual void OnPersonLeft(object sender, OfficeEventArgs e)
        {
            OfficeHanler handler = PersonLeft;
            handler?.Invoke(this, e);
        }

        public void Come(Person person)
        {
            Console.WriteLine();
            Console.WriteLine($"[В оффис пришёл {person.Name}.]");

            OnPersonCame(this, new OfficeEventArgs(person.Name, DateTime.Now));
            PersonCame += person.SayHiTo;
            PersonLeft += person.SayByeTo;
        }

        public void Leave(Person person)
        {
            Console.WriteLine();
            Console.WriteLine($"[{person.Name} ушёл домой.]");

            PersonCame -= person.SayHiTo;
            PersonLeft -= person.SayByeTo;
            OnPersonLeft(this, new OfficeEventArgs(person.Name, DateTime.Now));
        }

        public void Come(Person person, DateTime timeOfDay)
        {
            Console.WriteLine();
            Console.WriteLine($"[В оффис пришёл {person.Name}.]");

            OnPersonCame(this, new OfficeEventArgs(person.Name, timeOfDay));
            PersonCame += person.SayHiTo;
            PersonLeft += person.SayByeTo;
        }

        public void Leave(Person person, DateTime timeOfDay)
        {
            Console.WriteLine();
            Console.WriteLine($"[{person.Name} ушёл домой.]");

            PersonCame -= person.SayHiTo;
            PersonLeft -= person.SayByeTo;
            OnPersonLeft(this, new OfficeEventArgs(person.Name, timeOfDay));
        }
    }

    class OfficeEventArgs : EventArgs
    {
        public string Name { get; }

        public DateTime Time { get; }

        public OfficeEventArgs(string name)
        {
            Name = name;
            Time = DateTime.Now;
        }

        public OfficeEventArgs(string name, DateTime time)
        {
            Name = name;
            Time = time;
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Person person1 = new Person("Света");
            Person person2 = new Person("Лена");
            Person person3 = new Person("Вика");
            Person person4 = new Person("Вероника");
            Person person5 = new Person("Виктор Марьянович");
            Person person6 = new Person("дядя Боб");
            Person person7 = new Person("дядя Линус");

            Office office = new Office();

            office.Come(person6, new DateTime( 2021, 11, 14, 6, 0, 0 ));
            office.Come(person7, new DateTime(2021, 11, 14, 7, 0, 0));

            office.Come(person1, new DateTime(2021, 11, 14, 13, 0, 0));
            office.Come(person2, new DateTime(2021, 11, 14, 18, 0, 0));

            office.Leave(person1);
            office.Leave(person2);

            office.Leave(person7);
            office.Leave(person6);
        }
    }
}