using System;

using System.Threading.Tasks;       

​

public class Program

{

    public async static void Main()

    {

        Console.WriteLine("Hello World");

        //Scenario 1

        await SleepTaskAwaited();

        //Scenario 2

        await SleepTask();

    }

    public static async Task SleepTaskAwaited()

    {

        await Task.Delay(5);

    }

    public static Task SleepTask()

    {

        return Task.Delay(5);

    }

}