using System;

using System.Threading.Tasks;

public class Program

{

    public static async Task Main()

    {

        Console.WriteLine("[{0:mm:ss}] Calling slow ass function...", DateTime.Now);

        var t = SlowAssFunction();

        Console.WriteLine("[{0:mm:ss}] Returned from slow ass function! But it's not complete yet.", DateTime.Now);

        await Task.Delay(1000);

        Console.WriteLine("[{0:mm:ss}] Done something else while the slow ass function is still running!", DateTime.Now);

        Console.WriteLine("[{0:mm:ss}] Time to await it finally!", DateTime.Now);

        await t;

        Console.WriteLine("[{0:mm:ss}] Ah, the slow ass function is finally complete.", DateTime.Now);

    }

    public static async Task SlowAssFunction() { await Task.Delay(5000); }

}

​