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Csharp / AGENT SKILL
csharp-async
0
Provide best practices for asynchronous programming in C#.
Get best practices for C# async programming
Understand the trade-offs.
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Original instructions from the publisher’s SKILL.md
# C# Async Programming Best Practices Your goal is to help me follow best practices for asynchronous programming in C#. ## Naming Conventions - Use the 'Async' suffix for all async methods - Match method names with their synchronous counterparts when applicable (e.g., `GetDataAsync()` for `GetData()`) ## Return Types - Return `Task<T>` when the method returns a value - Return `Task` when the method doesn't return a value - Consider `ValueTask<T>` for high-performance scenarios to reduce allocations - Avoid returning `void` for async methods except for event handlers ## Exception Handling - Use try/catch blocks around await expressions - Avoid swallowing exceptions in async methods - Use `ConfigureAwait(false)` when appropriate to prevent deadlocks in library code - Propagate exceptions with `Task.FromException()` instead of throwing in async Task returning methods ## Performance - Use `Task.WhenAll()` for parallel execution of multiple tasks - Use `Task.WhenAny()` for implementing timeouts or taking the first completed task - Avoid unnecessary async/await when simply passing through task results - Consider cancellation tokens for long-running operations ## Common Pitfalls - Never use `.Wait()`, `.Result`, or `.GetAwaiter().GetResult()` in async code - Avoid mixing blocking and async code - Don't create async void methods (except for event handlers) - Always await Task-returning methods ## Implementation Patterns - Implement the async command pattern for long-running operations - Use async streams (IAsyncEnumerable<T>) for processing sequences asynchronously - Consider the task-based asynchronous pattern (TAP) for public APIs When reviewing my C# code, identify these issues and suggest improvements that follow these best practices.