using System;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        await Test();

    }

    public static async Task Test()

    {

        await PrintNumber(1);

        await PrintNumber(2);

        await PrintNumber(3);

​

        Console.WriteLine("This should be written first..");

    }

​

    public static async Task PrintNumber(int number)

    {

        await Task.Delay(1000);

​

        Console.WriteLine(number);

    }

}