---
title: "C# Developer - Air Market"
description: "You are building something in C# on modern .NET and want the usual pieces put together properly: the endpoints, the database layer, the async handling, the front end. This does that work. Reach for i…"
canonical: "https://airmarket.ai/app/csharp-developer"
---

[Air Market](/) / [Developer Tools](/category/devtools) / C# Developer

Skill by [Jeffallan](/@jeffallan)

# C# Developer

For .NET work: APIs, data access and Blazor screens

## What this does

You are building something in C# on modern .NET and want the usual pieces put together properly: the endpoints, the database layer, the async handling, the front end. This does that work. Reach for it when starting an API or a Blazor app, or adding structure to one that grew.

### Top 3 things it does for you

- Build a REST API in ASP.NET Core
- Set up database access with EF Core
- Scaffold Blazor components

## Information

**C# Developer at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [Jeffallan](/@jeffallan) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Version | 1.1.0 |
| Size | 58 KB |
| Licence | MIT |
| Repository | [Jeffallan/claude-skills](https://github.com/Jeffallan/claude-skills/tree/5e8b6b8ff4007414f91f980771047b6136600c34/skills/csharp-developer) |
| GitHub stars | 11,146 (as of Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of C# Developer and flagged nothing. AIR's verdict: **safe**.

**What C# Developer's check was run against**

|  |  |
| --- | --- |
| Commit | 5e8b6b8ff4007414f91f980771047b6136600c34 |
| Content hash | 882ea1ccfcc917f74b3ce1d43cd4ef9f10085d9db0b8612eb5a0a658ec2cc973 |
| Files read | [Browse the files at this exact commit](https://github.com/Jeffallan/claude-skills/blob/5e8b6b8ff4007414f91f980771047b6136600c34/skills/csharp-developer/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for C# Developer](/security/csharp-developer)

## About C# Developer

This is for building C# applications on .NET 8 and later, including ASP.NET Core APIs and Blazor web apps. REST APIs can be built with either minimal or controller-based routing.

It configures database access with Entity Framework Core, implements async patterns and cancellation, structures applications with CQRS via MediatR, and scaffolds Blazor components with state management.

## What's inside

- SKILL.md - instructions
- references/aspnet-core.md - reference
- references/blazor.md - reference
- references/entity-framework.md - reference
- references/modern-csharp.md - reference
- references/performance.md - reference

## Questions

### Is C# Developer safe to install?

AIR scanned this exact version of C# Developer and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 5e8b6b8ff400, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/csharp-developer.

### How do I install C# Developer?

Open https://airmarket.ai/app/csharp-developer on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/Jeffallan/claude-skills/tree/5e8b6b8ff4007414f91f980771047b6136600c34/skills/csharp-developer. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by Jeffallan](/@jeffallan)

---

Canonical URL: <https://airmarket.ai/app/csharp-developer>