Await new Task( … ) : Task does not run?

Question

A continuation of a question asked here :

In the aforementioned question I have the following function which returns an object of type Task (for incremental testing

Answer 1

You should never use the Task constructor (or Task.Start).

I do not want this function to return a task that is already running ( that is IMPERATIVE ).

So, you want to return some code that won't execute until you call it? That's a delegate, not a Task.

private static Func> GetInstance()
{
  return async () =>
  {
    await SimpleMessage.ShowAsync("TEST");
    return new object();
  };
}

When you're ready to execute it, call it just like any other delegate. Note that it returns a Task, so you can await the result:

var func = GetInstance();
// Delegate has not started executing yet
var task = func();
// Delegate has started executing
var result = await task;
// Delegate is done