using static System.Console;

using System.Threading;

using System.Threading.Tasks;

using System.Diagnostics;

​

public class Program {

    public static void Main(string[] args) {

        Task wait = ComDelay();

        WriteLine("O Main está executando algo após o Delay");

        wait.Wait();

        ComSleep();

        WriteLine("O Main está executando algo após o Sleep");

    }

​

    static async Task ComDelay() {

        var sw = new Stopwatch();

        sw.Start();

        WriteLine("Início Delay");

        await Task.Delay(2000);

        WriteLine("Demorou {0}ms", sw.ElapsedMilliseconds);

        WriteLine("Fim Delay");

    }

​

    static void ComSleep() {

        var sw = new Stopwatch();

        sw.Start();

        WriteLine("Início Sleep");

        Thread.Sleep(2000);

        WriteLine("Demorou {0}ms", sw.ElapsedMilliseconds);

        WriteLine("Fim Sleep");

    }

}