using System;

using System.Threading;

using System.Threading.Tasks;

​

public class Program

{

    public static async Task Main(string[] args)

    {

        var backgroundTask = Task.Run(() =>

        {

            Thread.Sleep(2000); //simulate some work

        }

        ).ContinueWith(_ =>

        {

            Console.WriteLine("Running the continuation!");

        }, TaskContinuationOptions.NotOnRanToCompletion);

        await backgroundTask;

    }

}