Sample code for https://stackoverflow.com/questions/52457054/c-sharp-task-continuewith-not-working-as-expected/52457672#52457672

gistfile1.txt

using System;
using System.Threading;
using System.Threading.Tasks;

namespace netcore
{
    class Program
    {
        static async Task TestAsync()
        {
            // this task or ConfigureAwait(false) affects nothing as long as awaited
            await Task.Run(() => Console.WriteLine("First task run")).ConfigureAwait(false);

            var task = Task.Run(() => Thread.Sleep(5000));
            await task.ContinueWith(t => Console.WriteLine("Continuation fired"));

            Console.WriteLine("Done");
        }

        static void Main(string[] args)
        {
            var _ = TestAsync();
            Console.ReadLine();
        }
    }
}