using System;

using System.Threading.Tasks;

​

Task task =

            Task.Factory.StartNew(

                () =>

                {

                    Console.WriteLine($"Running antecedent task {Task.CurrentId}...");

                    Console.WriteLine("Launching attached child tasks...");

                    for (int ctr = 1; ctr <= 5; ctr++)

                    {

                        int index = ctr;

                        Task.Factory.StartNew(

                            async value =>

                            {

                                Console.WriteLine($"   Attached child task #{value} running");

                                await Task.Delay(1000);

                            }, index);

                    }

                    Console.WriteLine("Finished launching detached child tasks...");

                }, TaskCreationOptions.DenyChildAttach);

​

        Task continuation =

            task.ContinueWith(

                antecedent =>

                    Console.WriteLine($"Executing continuation of Task {antecedent.Id}"));

​

        await continuation;