csharp-async

To fix C# async anti-patterns, remove blocking calls like .Result or .Wait and replace them with await. This Skill reviews C# code to identify these deadlocks and suggests safe, non-blocking Task-based patterns.

You should use ValueTask instead of Task in C# async code when a method often completes synchronously, reducing heap allocations. This Skill provides return type guidance to correctly apply Task, Task<T>, and ValueTask<T> in performance-sensitive services.

Async void causes unhandled exceptions because the calling method cannot await them, leading to application crashes. This Skill identifies async void usage and recommends avoiding it except for top-level event handlers to ensure correct exception propagation.

The best way to handle CancellationToken in C# async methods is to pass it through method signatures and check it during long-running operations. This Skill advises on proper cancellation support and exception handling patterns for async/await.

To use IAsyncEnumerable for streaming sequences in C#, yield return items asynchronously within an async method. This Skill promotes IAsyncEnumerable to replace buffered collections and improve performance in async streaming scenarios.

Yes, your C# library needs ConfigureAwait(false) to prevent capturing the synchronization context and avoid deadlocks. This Skill enforces ConfigureAwait usage in library code to ensure safer and faster asynchronous execution.