using System;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        var task = new Task(() => Thread.Sleep(1));

        try

        {

            Console.WriteLine("before");

            await task.WaitAsync(TimeSpan.FromSeconds(2));

            Console.WriteLine("after");

        }

        catch(Exception e)

        {

            Console.WriteLine(e.Message);

        }

    }

}