async/await common mistakes I keep seeing in production_

The most common async bug I see is calling .Result or .Wait() on a Task inside an async method running on a synchronization context. This deadlocks 100% of the time in ASP.NET Framework and WinForms. Always use await instead.

Pinning Stephen Cleary's blog series on async as required reading for this thread. It is the definitive guide on not blocking on async code in C#.

Task.Run is for CPU-bound work. Wrapping a synchronous I/O call in Task.Run does not make it truly async — you just burn a thread pool thread while waiting. Use truly async APIs: HttpClient, EF Core async methods, Stream.ReadAsync, and so on.

If you are writing a library (not application code), always use .ConfigureAwait(false) on every await. This avoids capturing the synchronization context and prevents deadlocks in callers who have not gone fully async yet.