Best Practices for Using async and await

on YouTube ↗01h 15m

" summary

Shows concrete bugs and fixes: an async void breaks code pattern causes uncaught exceptions and race conditions until inner methods return Task and callers await them; calling task.Result produces a reproducible deadlock on the UI thread; adding Task.Delay as a “fix” provokes races; using ConfigureAwait(false) prevents some deadlocks but then requires explicit marshalling back to the UI or synchronization context to access controls. Demonstrations use four .NET Core WPF sample apps and code is on GitHub (damirarh/jbdnd-async-await).

AI-written summary · about

" chapters (8)

1. 0:00Introduction
2. 4:42Synchronous vs. asynchronous
3. 13:23async void breaks asynchronous code
4. 31:52Deadlocks
5. 42:18ConfigureAwait(false)
6. 49:50SynchronizationContext
7. 55:07Summary
8. 59:20Q&A

" related talks

• 58mBack to Basics: Efficient Async and AwaitFilip Ekberg · NDC Sydney 2019
• 01h 02mBack to Basics: Efficient Async and AwaitFilip Ekberg · NDC Porto 2022
• 57mBack to Basics: Efficient Async and AwaitFilip Ekberg · NDC London 2017
• 59mAsynchronous Programming From The Ground UpFilip Ekberg · NDC Sydney 2017
• 01h 01mBack to Basics: Efficient Async and AwaitFilip Ekberg · NDC Oslo 2023
• 01h 00mCorrecting Common Async/Await Mistakes in .NETBrandon Minnick · NDC Oslo 2019
• 01h 01mCorrecting Common Async/Await Mistakes in .NET 9Brandon Minnick · NDC Melbourne 2025
• 01h 00mCorrecting Common Async/Await Mistakes in .NET 8Brandon Minnick · Copenhagen Developers Festival 2023