using System;

using System.Threading;

using System.Threading.Tasks;

public class Program

{

    private const int _waitSeconds = 1;

    private static int _execCount = 0;

    public static async void Main()

    {

        var testRequest = TestAsync();

        if (true) 

        {

            await Task.WhenAll(testRequest);

            Console.WriteLine($"OPTIONAL: {testRequest.Result}");

        }

        await Task.WhenAll(testRequest);

        Console.WriteLine($"REQUIRED: {testRequest.Result}");

    }

    private static async Task<int> TestAsync() 

    {

        Thread.Sleep(_waitSeconds * 1000);

        _execCount++;

        return _execCount;

    }

}