using System;

using System.Threading.Tasks;

using System.Threading;

​

namespace ASD

{

    public class Service

    {

        private int id;

        public Service(int id)

        {

            this.id = id;

        }

​

        public async Task Init()

        {

            var rnd = new Random(123456).Next(3000);

            Console.WriteLine($"Id '{id}' waiting '{rnd}'");

            await Task.Delay(rnd);

            Console.WriteLine($"Id '{id}' init done.");

        }

    }

​

    class Program

    {

        static async Task Main(string[] args)

        {

            for (int i = 0; i < 5; i++)

            {

                var s = new Service(i);

                await s.Init().ConfigureAwait(true);

//              await s.Init().ContinueWith(t => Console.WriteLine($"Id '{i}' done."));

                //s.Init();

                Console.WriteLine($"Id '{i}' done.");

            }

        }

    }

}