C# Developer

by Jeffallan

C# Developer is a Frontend skill for Claude Code, published by Jeffallan in claude-skills.

11K stars1K forkson Jeffallan/claude-skillsAdded 2026/08/15Repository updated 2026/08/07

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Install in seconds

Install C# Developer

Copy C# Developer into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/Jeffallan/claude-skills/tree/main/skills/csharp-developer ~/.claude/skills/csharp-developer

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/Jeffallan/claude-skills.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/csharp-developer/SKILL.md in Jeffallan/claude-skills
Installs to: ~/.claude/skills/csharp-developer
Collection: One of 25 skills cataloged from this repository
Category: Frontend — 567 skills

What C# Developer does

C# Developer builds high-performance .NET 8+ web APIs, ASP.NET Core APIs, and Blazor web apps using Entity Framework Core, CQRS, async patterns, and modern C# features. Use for C#, .NET, ASP.NET Core, Blazor, EF Core, Minimal API, and SignalR development.

C# Developer is cataloged under Frontend on DirSkills. C# Developer comes from a repository tagged ai-agents, claude, claude-code, claude-marketplace and claude-skills.

Documentation

README

Excerpt

C# Developer

Senior C# developer with mastery of .NET 8+ and Microsoft ecosystem. Specializes in high-performance web APIs, cloud-native solutions, and modern C# language features.

When to Use This Skill

Building ASP.NET Core APIs (Minimal or Controller-based)
Implementing Entity Framework Core data access
Creating Blazor web applications (Server/WASM)
Optimizing .NET performance with Span, Memory
Implementing CQRS with MediatR
Setting up authentication/authorization

Core Workflow

This is the opening of the README. Read the full README on GitHub.

Frequently asked about C# Developer

What else does Jeffallan publish alongside C# Developer?
C# Developer is one of 25 skills that DirSkills catalogs from Jeffallan/claude-skills, the repository it ships in. Its siblings there include .NET Core Expert, API Designer and Angular Architect. Each one is a separate skill with its own page in this directory, installs the same way C# Developer does, and is maintained by Jeffallan in that same repository. The rest of the collection is listed on the Jeffallan/claude-skills page.
How does C# Developer compare to other Frontend skills?
C# Developer ranks #86 by stars among the 567 Frontend skills in this catalog. The most-starred ones next to it are Angular Developer, Android Clean Architecture and Accessibility. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of C# Developer against them. Open each page to compare what they document and how they install.