using System;

using System.Diagnostics;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("== Await before cycle");

        Method().Wait();

        Console.WriteLine();

        Console.WriteLine("== Await in cycle");

        Method2().Wait();

    }

    public static async Task Method() {

        Stopwatch stopWatch = new Stopwatch();

        var t = await Task.Delay(1000).ContinueWith(_ => 10);

        var res = 0;

        stopWatch.Start();

        for(var i=0;i<10000000;i++) res += t;

        stopWatch.Stop();

        TimeSpan ts = stopWatch.Elapsed;

​

        string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",

            ts.Hours, ts.Minutes, ts.Seconds,

            ts.Milliseconds / 10);

        Console.WriteLine("RunTime " + elapsedTime);

    }

    public static async Task Method2() {

        Stopwatch stopWatch = new Stopwatch();

        var t = Task.Delay(1000).ContinueWith(_ => 10);

        var res = 0;

        stopWatch.Start();

        for(var i=0;i<10000000;i++) res += await t;

        stopWatch.Stop();

        TimeSpan ts = stopWatch.Elapsed;

​

        string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",

            ts.Hours, ts.Minutes, ts.Seconds,

            ts.Milliseconds / 10);

        Console.WriteLine("RunTime " + elapsedTime);

    }

}