task1(c)

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

namespace task
{
    public class Service <T>
    {
        private List<T> list;

        private Function comparator;

        private event EventHandler end_Sort;
        public delegate void EventHandler (List <T> list);

        public delegate int Function (T a, T b);

        public Service (List <T> list, Function comparator)
        {
            this.list = list;
            this.comparator = comparator;
        }

        public void Runner ()
        {
            Thread th1 = new Thread (delegate() {
                list.Sort (new Comparison <T> (comparator));
                if (end_Sort != null)
                    end_Sort (list);
            });
            th1.Start ();
        }

        public void AddHandler (EventHandler handler)
        {
            end_Sort += handler;
        }
    }

    class Program
    {
        public static int IntComparator(int a, int b)
        {
            return a.CompareTo(b);
        }

        public static void Print<T>(List<T> list)
        {
            foreach (var item in list)
                Console.Write("{0} ", item);
        }

        public static void Main(string[] args)
        {
            List<int> list = new List<int> { 9, 2, 4, 3, 8, 6, 3, 5 };
            List<int> array = new List<int> { 9, 8, 7, 6, 5, 4, 3, 2 };
            Service<int> intServ = new Service<int> (list, IntComparator);
            intServ.AddHandler (Print<int>);
            intServ.Runner ();

            Thread.Sleep (300);

            Console.WriteLine ();
            Service<int> intServ_a = new Service<int> (array, IntComparator);
            intServ_a.AddHandler (Print<int>);
            intServ_a.Runner ();
        }
    }
}