using System;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        var task = FooAsync();

        await Task.Delay(200);

        Console.WriteLine("Task not awaited yet");

        await task;

        Console.WriteLine("Task awaited");

    }

​

    static async ValueTask FooAsync()

    {

        Console.WriteLine("Task started");

        await Task.Delay(100);

        Console.WriteLine("Task finished");

    }

}

​