What does ConfigureAwait false mean?
What does ConfigureAwait false mean?
ConfigureAwait(false) involves a task that’s already completed by the time it’s awaited (which is actually incredibly common), then the ConfigureAwait(false) will be meaningless, as the thread continues to execute code in the method after this and still in the same context that was there previously.
When should you use ConfigureAwait false?
As a general rule, every piece of code that is not in a view model and/or that does not need to go back on the main thread should use ConfigureAwait false. This is simple, easy and can improve the performance of an application by freeing the UI thread for a little longer.
Why is ConfigureAwait False not default?
Since deadlocks are a lot less dangerous and easier to detect than thread-unsafe accesses, picking ConfigureAwait(true) as the default is the more conservative choice. Just because your typical use case requires ConfigureAwait(false), it doesn’t mean that it is the “correct” or most used option.
Why You Should Use ConfigureAwait?
ConfigureAwait(false) configures the task so that continuation after the await does not have to be run in the caller context, therefore avoiding any possible deadlocks.
What does ConfigureAwait true do?
A situation to use ConfigureAwait(true) is when performing await in a lock, or using any other context/thread specific resources. This requires a synchronization context, which you will have to create, unless you are using Windows Forms or WPF, which automatically create a UI synchronization context.
What happens when you call async method without await?
The call to the async method starts an asynchronous task. However, because no Await operator is applied, the program continues without waiting for the task to complete. If you don’t await the task or explicitly check for exceptions, the exception is lost. If you await the task, its exception is rethrown.
What’s the difference between asynchronous programming and multithreaded programming?
From the definitions we just provided, we can see that multithreading programming is all about concurrent execution of different functions. Async programming is about non-blocking execution between functions, and we can apply async with single-threaded or multithreaded programming.
What is TaskCompletionSource C#?
Run turns something synchronous into a Task (by running it on a separate thread), TaskCompletionSource turns something that is already asynchronous into a Task . For example, there is the Asynchronous Programming Model, where you pass an AsyncCallback into a BeginInvoke method.
What is IAsyncEnumerable?
IAsyncEnumerable was introduced in . NET Core 3 (. NET Standard 2.1). It exposes an enumerator that has a MoveNextAsync() method that can awaited. This means the producer can make asynchronous calls in between yielding results.
What happens if you dont use await?
If you forget to use await while calling an async function, the function starts executing. This means that await is not required for executing the function. Another consequence is that the compiler won’t know that you want to wait for the function to execute completely.
What is async void?
Void-returning async methods have a specific purpose: to make asynchronous event handlers possible. 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 SynchronizationContext that was active when the async void method started.
When to use.configureawait in.net Stack Overflow?
ConfigureAwait (false): Runs the rest of the code on the same thread the awaited code was run on. If the await is followed by a code that accesses the UI, the task should be appended with.ConfigureAwait (true). Otherwise, an InvalidOperationException will occur due to another thread accessing UI elements.
Which is true or false in configureawait ( true )?
ConfigureAwait (false) tells it that it does not need the context, so the code can be run anywhere. It could be any thread that runs it. If the await is followed by a code that accesses the UI, the task should be appended with .ConfigureAwait (true).
Is the configureawait method recognized by the compiler?
The ConfigureAwait method isn’t special: it’s not recognized in any special way by the compiler or by the runtime. It is simply a method that returns a struct (a ConfiguredTaskAwaitable) that wraps the original task it was called on as well as the specified Boolean value.
When to use configureawait or continueoncapturedcontext?
ConfigureAwait(continueOnCapturedContext: false) is used to avoid forcing the callback to be invoked on the original context or scheduler. This has a few benefits: