C# Async Best Practices
Reviews and writes C# async code following common async/await best practices
- Repository
- github/awesome-copilot
- Stars
- 40,703
- Licence
- MIT
- Files
- 1 file
What it does
When installed, the agent follows a checklist of C# asynchronous programming guidelines whenever you write or review C# code. It covers naming async methods with an Async suffix, choosing return types like Task and ValueTask, handling exceptions around await, running tasks in parallel with Task.WhenAll, and avoiding blocking calls such as .Result or .Wait(). It is a set of instructions rather than a tool, so it changes how the agent thinks about your code without running anything itself.
Great for
- C# developers who want consistent async code reviews
- Teams onboarding developers to async/await conventions
- Developers reviewing legacy C# code for deadlock-prone blocking calls
Skip it if
- Non-C# projects, since the guidance is specific to C# and .NET (wrong language, unhelpful advice)
- Experienced async experts who need deep runtime or framework-specific analysis, since the guidance is brief and general
Try asking
- “Review this C# service class for async anti-patterns and suggest fixes”
- “Refactor this method to use Task.WhenAll for parallel calls”
- “Check whether my async methods handle exceptions and cancellation correctly”
Install in 3 steps
- 1
Download the skill
The ZIP contains the 1 original files, the MIT licence and an attribution note.
csharp-async.zip - 2
Add it to your agent
Claude Code (all projects)
mkdir -p ~/.claude/skills && unzip csharp-async.zip -d ~/.claude/skills/Claude Code / Agent SDK (this project only)
mkdir -p .claude/skills && unzip csharp-async.zip -d .claude/skills/Claude apps (web/desktop): Settings → Capabilities → Skills → Upload skill, and choose the ZIP.
- 3
Ask for the task
No special command needed — the agent reads the skill's description and loads it when your request matches. Try one of the prompts above.
Get better results
- Paste the specific C# methods you want reviewed so the agent can point to exact lines.
- Ask for explanations alongside suggestions if you are learning async patterns.
- Treat the advice as a starting checklist and verify changes with your own tests, since the skill itself does not test code.
What's inside
- SKILL.md
Redistributed unmodified from github/awesome-copilot under the MIT licence. The assessment was drafted with AI from the skill's files on 2026-10-29. Skills can instruct your agent to run code — read SKILL.md and any scripts before installing.