using System;

using System.Diagnostics;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        var stopwatch = Stopwatch.StartNew();

        var taskEmailageData = CreateFakeTask("EmailageData", cost: 5, slaWatch: stopwatch);

        var taskOthers = CreateFakeTask("OtherData", cost: 5, slaWatch: stopwatch);

        Task.WaitAll(new[]{taskEmailageData, taskOthers}, TimeSpan.FromSeconds(3));

        Console.WriteLine(stopwatch.ElapsedMilliseconds);

        Console.WriteLine(taskEmailageData.Status);

    }

    private static Task CreateFakeTask(string taskName, int cost, Stopwatch slaWatch)

    {       

        return Task.Factory.StartNew(() =>{

            Console.WriteLine($"{taskName} fakeTask start: {slaWatch.ElapsedMilliseconds}ms");

            var innerTask = Task.Factory.StartNew(async() =>{

                Console.WriteLine($"{taskName} innerTask start: {slaWatch.ElapsedMilliseconds}ms");

                await Task.Delay(TimeSpan.FromSeconds(cost));

                Console.WriteLine($"{taskName} innerTask end: {slaWatch.ElapsedMilliseconds}ms");

            }, TaskCreationOptions.LongRunning).Unwrap();

            Console.WriteLine($"{taskName} innerTask.Wait start: {slaWatch.ElapsedMilliseconds}ms");

            innerTask.Wait(cost);

            Console.WriteLine($"{taskName} innerTask.Wait end: {slaWatch.ElapsedMilliseconds}ms");

            Console.WriteLine($"{taskName} fakeTask end: {slaWatch.ElapsedMilliseconds}ms");

        }, TaskCreationOptions.LongRunning);

    }

}