Task vs async Task

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Ok, I've been trying to figure this out, I've read some articles but none of them provide the answer I'm looking for.

My question is: Why Task has to return a Task whilst async Task doesn't? For example:

public override Task TokenEndpoint(OAuthTokenEndpointContext context)
{
    // Code removed for brevity.

    return Task.FromResult<object>(null);
}

As you can see there, that method isn't async, so it has to return a Task.

Now, take a look at this one:

public override async Task GrantResourceOwnerCredentials(OAuthGrantResourceOwnerCredentialsContext context)
{
    // Code removed for brevity...
    if(user == null)
    {
        context.SetError("invalid_grant", "username_or_password_incorrect");
        return;
    }

    if(!user.EmailConfirmed)
    {
        context.SetError("invalid_grant", "email_not_confirmed");
        return;
    }

    // Code removed for brevity, no returns down here...
}

It uses the async keyword, but it doesn't return a Task. Why is that? I know this may be probably the stupidest question ever. But I wanna know why it is like this.

The first method is not an asynchronous method. It returns a task, but by the time it returns the task, the entire method would have been done anyway.

The second method is asynchronous. Essentially, your code will execute synchronously until it reaches an await keyword. Once it does, it will call the async function and return control to the function that called it. Once the async function returns its Task, the awaited function resumes where it left off. There's more to it than that, and this was a relatively sparse answer.

However, the MSDN page on the async keyword should help your understanding.

"async Task then await Task" vs "Task then return task", It is almost the same (in terms of threads etc.). But for the second one (using await ) a lot more overhead will be created by the compiler. This means that one can await the result of an async method because it returns a Task, not for being marked as async. A method can return async Task, Task, or void. It is advised to return void only when necessary since the Tasks are awaitable, while void is not. For example, using async void in an Event Handler is not awaitable.

async is an indicator to the compiler that the method contains an await. When this is the case, your method implicitly returns a Task, so you don't need to.

sfeldman.NET - Task vs async Task, Now the same method with a slight variation, marking the method as async and awaiting the delay. async Task MainAsync() { await Task.Delay(� Packaged Task vs async. p> Packaged task holds a task [function or function object] and future/promise pair. When the task executes a return statement, it causes set_value(..) on the packaged_task's promise.

Async methods are different than normal methods. Whatever you return from async methods are wrapped in a Task. If you return no value(void) it will be wrapped in Task, If you return int it will be wrapped in Task and so on. Same question : async await return Task

Task.Run vs Async Await, A method can return async Task, Task, or void. It is advised to return void only when necessary since the Tasks are awaitable, while void is not. Async void methods have different composing semantics. Async methods returning Task or Task can be easily composed using await, Task.WhenAny, Task.WhenAll and so on. Async methods returning void don’t provide an easy way to notify the calling code that they’ve completed.

Asynchronous programming with async and await, In this article. Don't block, await instead; Start tasks concurrently; Composition with tasks; Await tasks efficiently; Next steps. The Task� The task-based asynchronous pattern (TAP) is based on the System.Threading.Tasks.Task and System.Threading.Tasks.Task<TResult> types in the System.Threading.Tasks namespace, which are used to represent arbitrary asynchronous operations. TAP is the recommended asynchronous design pattern for new development.

Async Return Types (C#), public static async Task<string> ShowTodaysInfo() { string ret = $"Today is { DateTime.Today:D}\n" + "Today's hours of leisure: " + $"{await� Async void methods have different error-handling semantics. When an exception is thrown out of an async Task or async Task<T> method, that exception is captured and placed on the Task object. With async void methods, there is no Task object, so any exceptions thrown out of an async void method will be raised directly on the

Do not await what does not need to be awaited, public async Task FooBar() { using (var foo = new Foo()) { await extra class with one asynchronous method is 6144 vs 5632 bytes on disk. Asynchronous programming with async and await. 06/04/2020; 13 minutes to read +14; In this article. The Task asynchronous programming model (TAP) provides an abstraction over asynchronous code.