Modern Csharp
Modern C# language features for .NET 10 and C# 14. Covers primary constructors, collection expressions, the field keyword, extension members, records, pattern matching, spans, and raw string literals. Load this skill when writing any new C# code, reviewing existing code for modernization, using "modern C#", "C# 14", "primary constructor", "collection expression", "records", "pattern matching", "span", "field keyword", or "extension members". Always loaded as the baseline for all agents.
What this skill does
Modern Csharp is a community-contributed Claude Code skill in the mobile sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/modern-csharp/ and loads when your prompt matches the skill's trigger.
Who uses this skill
The Modern Csharp Claude Code skill is built for software engineers, backend developers, full-stack teams, and technical leads building and maintaining production systems. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 117,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
How to install
Free
Manual install (2 steps)
mkdir -p ~/.claude/skills/modern-csharp
curl -L https://claudskills.com/skills/modern-csharp/SKILL.md \
-o ~/.claude/skills/modern-csharp/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/modern-csharp/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/modern-csharp/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\modern-csharp\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Modern Csharp Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/modern-csharp/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Modern Csharp skill do?
Modern C# language features for .NET 10 and C# 14. Covers primary constructors, collection expressions, the field keyword, extension members, records, pattern matching, spans, and raw string literals. Load this skill when writing any new C# code, reviewing existing code for modernization, using "modern C#", "C# 14", "primary constructor", "collection expression", "records", "pattern matching", "span", "field keyword", or "extension members". Always loaded as the baseline for all agents.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Modern Csharp skill?
Use Modern Csharp when your Claude Code task falls under the Engineering category — specifically in the mobile area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Modern Csharp" or describe the task and let Claude pick). Browse related skills at
/category/engineering/.
What is a Claude Code skill and how does the Modern Csharp skill fit in?
A Claude Code skill is a
SKILL.md file that lives under
~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Modern Csharp is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Engineering category. Learn more at
/learn/what-is-a-claude-skill/.
Attribution & license
Cite this skill
If you reference this skill in a blog post, paper, or documentation, you can cite it as:
APA
Resgrid. (2026). Modern Csharp [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/modern-csharp/
BibTeX
@misc{modern-csharp-2026,
author = {Resgrid},
title = {Modern Csharp [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/modern-csharp/}
}Embed this skill
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