Async Best Practices and Exceptions
Learn how to handle asynchronous exceptions correctly, avoid deadlocks with ConfigureAwait, and apply industry-standard best practices for robust concurrent code.
Writing asynchronous code is straightforward, but ensuring reliability is challenging. In previous lessons, we learned how to start tasks and process data in parallel. However, without proper error handling and configuration, async code can lead to silent failures or application freezes.
This lesson covers the essential patterns to keep your production code stable.
Handling async exceptions
When an exception occurs inside a synchronous method, it bubbles up the call stack immediately. In asynchronous code, the Task object captures exceptions. The runtime rethrows them only when you await the task.
The try-catch block
You can use standard try-catch blocks around await calls. The runtime unwraps the exception from the Task and throws it normally.