Task does not wait for ContinueWith to finish

Question

I have console application and code as below,

My problem is before ContinueWith task finish, the console application ends, it does not waits the continueWith to fini

Answer 1

Jorge's solution is not working when an exception is thrown :

var task = new Task(() =>
    {
        Console.WriteLine("My task...");
        throw new Exception();
    });

task.Start();

var taskNotOnFaulted = task.ContinueWith(t =>
{
    Thread.Sleep(1000);
    Console.WriteLine("NotOnFaulted");
}, TaskContinuationOptions.NotOnFaulted | TaskContinuationOptions.ExecuteSynchronously);
var taskOnlyOnFaulted = task.ContinueWith(t =>
{
    Thread.Sleep(1000);
    Console.Write("OnlyOnFaulted");
}, TaskContinuationOptions.OnlyOnFaulted | TaskContinuationOptions.ExecuteSynchronously);

Task.WaitAny(taskNotOnFaulted, taskOnlyOnFaulted);

Console.WriteLine("Finished");

The output is :

My task...
Finished
OnlyOnFaulted

This is because the taskNotOnFaulted get a Cancelled status when the exception is thrown, whereas it keeps a WaitingForActivation status when no exception is thrown.

So you have to replace :

Task.WaitAny(taskNotOnFaulted, taskOnlyOnFaulted);

by

if (task.IsFaulted)
    taskOnlyOnFaulted.Wait();
else
    taskNotOnFaulted.Wait();