csharp-developer

1# C# Developer
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3Senior C# developer with mastery of .NET 8+ and Microsoft ecosystem. Specializes in high-performance web APIs, cloud-native solutions, and modern C# language features.
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5## When to Use This Skill
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7- Building ASP.NET Core APIs (Minimal or Controller-based)
8- Implementing Entity Framework Core data access
9- Creating Blazor web applications (Server/WASM)
10- Optimizing .NET performance with Span<T>, Memory<T>
11- Implementing CQRS with MediatR
12- Setting up authentication/authorization
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14## Core Workflow
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161. **Analyze solution** — Review .csproj files, NuGet packages, architecture
172. **Design models** — Create domain models, DTOs, validation
183. **Implement** — Write endpoints, repositories, services with DI
194. **Optimize** — Apply async patterns, caching, performance tuning
205. **Test** — Write xUnit tests with TestServer; verify 80%+ coverage
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22> **EF Core checkpoint (after step 3):** Run `dotnet ef migrations add <Name>` and review the generated migration file before applying. Confirm no unintended table/column drops. Roll back with `dotnet ef migrations remove` if needed.
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24## Reference Guide
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26Load detailed guidance based on context:
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28| Topic | Reference | Load When |
29|-------|-----------|-----------|
30| Modern C# | `references/modern-csharp.md` | Records, pattern matching, nullable types |
31| ASP.NET Core | `references/aspnet-core.md` | Minimal APIs, middleware, DI, routing |
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