using System;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static void Main()

    {

        SeveralTasks().Wait();

        Console.WriteLine("Continued after 1 and 3");

        Thread.Sleep(100);

    }

    public static async Task SeveralTasks()

    {

        await Task1();

        var _ = Task2();

        await Task3();

    }

    public static async Task<int> Task1()

    {

        await Task.Delay(10);

        Console.WriteLine("Task1");

        return 0;

    }

    public static async Task<int> Task2()

    {

        await Task.Delay(20);

        Console.WriteLine("Task2");

        return 0;

    }

    public static async Task<int> Task3()

    {

        await Task.Delay(5);

        Console.WriteLine("Task3");

        return 0;

    }

}