Why no Task is being created?

Question

While testing a few implementation option I have stumbled on some unclear issues regarding TPL. Basically my question is, When calling an async Task returning method, is a Task created? In the following code, what will happen?

public static void Main(string[] args){
    Task t = SomeAsyncMethod()
    Task.WaitAll(t)  
}

private static async Task<IEnumerable<string>> SomeAsyncMethod()
{
        //some implementation
}

I assumed a Task should be created in this code but when watching the Parallel Task Debug window no Task was created. Would you please clarify this.

Update: svick gave a good explanation to the above scenario, which created a follow up question. Will the following code create two Task or only one? Is it good practice, when the main goal is to create separate Tasks.:

public static void Main(string[] args) {
    Task t = Task.Factory.StartNew(SomeAsyncMethodWrapper());
}

private async void SomeAsyncMethodWrappe(){
    ver result = await AsyncMethod();
    //do something with the result
}

private static async Task<IEnumerable<string>>(){
    //do some work and return a result value
    var innerResult = await someLibraryAsyncMethod();
    return innerResult;
}

Answer 1

A Task will be created, otherwise your code couldn't work. But it's a different kind of Task from the ones that are used for parallel processing, which I assume is what “Parallel Tasks” means.

The difference is that “normal” Task s are basically wrappers around some synchronous code that usually executes on the ThreadPool . On the other hand, async Task s complete when something happens (some information is read from the disk; async method completes), but they don't directly represent some code and are never associated with a thread.

Answer 2

Method should be like this if you want to see task in Parallel Tasks window.

private static async Task<IEnumerable<string>> SomeAsyncMethod()
{
await Task.Factory.StartNew(() => Thread.Sleep(TimeSpan.FromMinutes(10)));
return new List<string>();
}