Correcting Common Async/Await Mistakes in .NET 8 - Brandon Minnick - NDC Porto 2023

Correct common mistakes in asynchronous programming in .NET 8 with expert tips on thread creation, cancellation, exceptions, and more. Learn best practices to improve performance and reliability in your .NET applications.

Key takeaways

The async keyword adds about 100 bytes and can lead to unnecessary thread creation.
The await keyword can be used to avoid unnecessary thread creation by allowing the thread to be reused.
Avoid using async void as it can lead to exceptions being swallowed and not propagated to the calling thread.
Use configure await false to avoid thread reuse and ensure that the calling thread is reused.
Use a cancellation token to cancel a task that is running in the background.
Use yield return to allow a method to return partial results instead of waiting for the entire method to complete.
Avoid using return await as it can lead to unnecessary thread creation.
Use try-catch block to handle exceptions and ensure that the task is cancelled if an exception is thrown.
Use a ValueTask to improve performance by avoiding unnecessary thread creation.
Use IAsyncEnumerable to allow a method to return a sequence of values instead of a single value.
Avoid using async in the constructor as it can lead to issues with the synchronization context.
Use configure await false in the constructor to ensure that the calling thread is reused.
Use IProgress<T> to report progress and handle exceptions in a background task.
Avoid using async in a using block as it can lead to issues with the synchronization context.

Correcting Common Async/Await Mistakes in .NET 8 - Brandon Minnick - NDC Porto 2023

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