using System;

using System.Threading.Tasks;

using System.Runtime.CompilerServices;

public class C {

    public static async Task Main() {

        try {

            await "no u";

        } catch {}

    }

}

​

public static class StringExt

{

    public static TaskAwaiter GetAwaiter(this string str)

    {

        Console.WriteLine(str);

        return new TaskAwaiter();

    }

}