using System;

using System.Diagnostics;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        await d("Before");

        d("Inline");

        Task.Run(async () => await d("Task.Run"));

        await d("After");

        TimedAsync("Timed Task.Run", (s) => Task.Run(async () => await d(s)));

        TimedAsync("Timed inline",(s) => d(s));

        await Task.Delay(1000); // wait for all tasks to finish

    }

    private static async Task d(string s)

    {

        Console.WriteLine($"{s} ThreadId: {Thread.CurrentThread.ManagedThreadId}");

        Thread.Sleep(200);

    }

    private static async Task TimedAsync(string s, Func<string, Task> f)

    {

        var sw = Stopwatch.GetTimestamp();

        f(s);

        var elapsed = Stopwatch.GetElapsedTime(sw);

        Console.WriteLine($"{s} elapsed: {elapsed}");

    }

}