using System;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        Console.WriteLine("running:");

        await DoStuff();

        Console.WriteLine("completed:");

    }

    private static Task DoStuff()

    {

        try

        {

            return DoAndThrow();

        }

        catch (ArgumentException ex)

        {

            Console.WriteLine("exception: " + ex.Message);

            return Task.CompletedTask;

        }

    }

    private static async Task DoAndThrow()

    {

        await Task.Delay(1000);

        Console.WriteLine("before throw2");

        throw new ArgumentException("The throw");

    }

}