Has-a

using System;
using System.Collections;
using System.Collections.Generic;

namespace HomeWorks
{
    class Program  //Has-a, ссылки между объектами. У n, есть x.
    {
        static void Main(string[] args)
        {
            User user1 = new User("Name 1");
            User user2 = new User("Name 2");
            List list = new List(new Task[] { new Task(user1, "Task 1"), new Task(user2, "Task 2") });

            list.ShowAllTasks();
        }
    }

    class User
    {
        public string Name;

        public User(string name)
        {
            Name = name;
        }
    }

    class List
    {
        public Task[] Tasks;

        public List(Task[] tasks)
        {
            Tasks = tasks;
        }

        public void ShowAllTasks()
        {
            for (int i = 0; i < Tasks.Length; i++)
            {
                Tasks[i].ShowInfo();
            }
        }
    }

    class Task
    {
        public User Worker;
        public string Description;

        public Task(User worker, string description)
        {
            Worker = worker;
            Description = description;
        }

        public void ShowInfo()
        {
            Console.WriteLine($"Ответственный: {Worker.Name}, задача: {Description}");
        }
    }
}