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Official agent skill

Csharp Async

by github in github/awesome-copilot

Get best practices for C async programming. An agent skill from github/awesome-copilot.

OfficialMITAuto-check passedDevelopment

Install Csharp Async

skills CLI
$ npx skills add github/awesome-copilot --skill csharp-async -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install github/awesome-copilot csharp-async --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/github/awesome-copilot.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/csharp-async .claude/skills/csharp-async && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
csharp-async
GitHub stars
40k
Used in
2 other repos
Token cost
~466 tokens
SKILL.md length
223 words
Files
1
Skills in repo
417
Repo updated
First seen
Licence
MIT

At a glance

Get best practices for C async programming. An agent skill from github/awesome-copilot.

  • Tasks that involve Async programming
  • SKILL.md covers Naming Conventions, Return Types, Exception Handling and Performance, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Csharp Async is an agent skill from github/awesome-copilot, published by the product's own GitHub organization. Get best practices for C async programming

Its SKILL.md is about 470 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Development, covering Async programming. It works with C#. The repository describes itself as: Community-contributed instructions, agents, skills, and configurations to help you make the most of GitHub Copilot. The licence is MIT.

When your agent uses it

  • Tasks that involve Async programming

Example prompts

  • “/csharp-async”

What it can do on your machine

Read from SKILL.md and the folder at commit 727ff2e. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Csharp Async loads about 466 tokens when it runs. Until then it costs about 14 tokens; SKILL.md has 223 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~14
When it runs · the whole SKILL.md, loaded when a task matches
~466

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from github/awesome-copilot at commit 727ff2e, republished under its MIT licence (© github). 223 words, ~466 tokens.

Download SKILL.mdSave it as .claude/skills/csharp-async/SKILL.md (or your agent's skills folder).
name
csharp-async
description
Get best practices for C# async programming

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.

© github, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/csharp-async of github/awesome-copilot.

Open the folder on GitHubat commit 727ff2e

Used in 2 other repositories

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in github/awesome-copilot, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Csharp Async next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Csharp Async compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Csharp Async this skillgithub/awesome-copilot40k2 repos~466Automated safety check: PassMIT
Csharp Async Patternssketch7/FluentlyHttpClient1211 repos~5.9kAutomated safety check: NotesMIT
Modern Csharp Coding Standardssketch7/FluentlyHttpClient1213 repos~2.7kAutomated safety check: PassMIT
Akka.NET Best PracticesAaronontheweb/dotnet-skills1.2k1 repos~3.3kAutomated safety check: PassMIT
Dotnet Csharpnovotnyllc/dotnet-artisan233—~1.7kAutomated safety check: PassMIT
Csharp Concurrency PatternsAaronontheweb/dotnet-skills1.2k1 repos~2.2kAutomated safety check: PassMIT

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Works with

Categories

Questions about Csharp Async

What does Csharp Async do?

Get best practices for C async programming. An agent skill from github/awesome-copilot. Csharp Async is an agent skill from github/awesome-copilot, published by the product's own GitHub organization.

When should I use Csharp Async?

Csharp Async fits situations like: tasks that involve Async programming.

How do I install Csharp Async in Claude Code?

Run `npx skills add github/awesome-copilot --skill csharp-async -a claude-code`. Or copy the skill folder (skills/csharp-async in github/awesome-copilot) into .claude/skills/csharp-async in your project. Claude Code loads it when a task matches its description.

How do I install Csharp Async in Codex?

Run `npx skills add github/awesome-copilot --skill csharp-async -a codex`. Or copy the skill folder (skills/csharp-async in github/awesome-copilot) into .agents/skills/csharp-async in your project. Codex loads it when a task matches its description.

Can I use Csharp Async in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add github/awesome-copilot --skill csharp-async -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/csharp-async, .gemini/skills/csharp-async, .github/skills/csharp-async and .opencode/skills/csharp-async in your project.

What does Csharp Async need to run?

SKILL.md names no scripts, command-line tools or credentials: Csharp Async is instructions for the agent only.

Does Csharp Async access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Csharp Async safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Csharp Async use?

Csharp Async is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Csharp Async use?

About 466 tokens (SKILL.md is roughly 1.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Csharp Async?

Skills that share tags, products or a category with Csharp Async: Csharp Async Patterns (sketch7/FluentlyHttpClient, 121 stars), Modern Csharp Coding Standards (sketch7/FluentlyHttpClient, 121 stars), Akka.NET Best Practices (Aaronontheweb/dotnet-skills, 1.2k stars) and Dotnet Csharp (novotnyllc/dotnet-artisan, 233 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Csharp Async?

github (a GitHub organization, an official publisher) maintains it in github/awesome-copilot, which has 39,748 GitHub stars. The repository holds 417 skills in this directory. The repository was last updated on October 7, 2026.

Source: github/awesome-copilot on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.