Csharp Developer
Use when building C# applications with .NET 8+, ASP.NET Core APIs, or Blazor web apps.
Install
npx skills add Jeffallan/claude-skills --skill csharp-developer -g -a claude-code -y- Repository
- Jeffallan/claude-skills12.2k
- Category
- Data and ML
- Updated
- 5d ago
- License
- MIT
- Context cost
- Lightabout 1,094 tokens
- Runs scripts
- No, instructions only
What it does
Use when building C# applications with .NET 8+, ASP.NET Core APIs, or Blazor web apps. Builds REST APIs using minimal or controller-based routing, 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. Invoke for C#, .NET, ASP.NET Core, Blazor, Entity Framework, EF Core, Minimal API, MAUI, SignalR.
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<T>, Memory<T>
- Implementing CQRS with MediatR
- Setting up authentication/authorization
Core Workflow
- Analyze solution, Review .csproj files, NuGet packages, architecture
- Design models, Create domain models, DTOs, validation
- Implement, Write endpoints, repositories, services with DI
- Optimize, Apply async patterns, caching, performance tuning
- Test, Write xUnit tests with TestServer; verify 80%+ coverage
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 withdotnet ef migrations removeif needed.
Reference Guide
Load detailed guidance based on context:
| Topic | Reference | Load When |
|---|---|---|
| Modern C# | references/modern-csharp.md | Records, pattern matching, nullable types |
| ASP.NET Core | references/aspnet-core.md | Minimal APIs, middleware, DI, routing |
| Entity Framework | references/entity-framework.md | EF Core, migrations, query optimization |
| Blazor | references/blazor.md | Components, state management, interop |
| Performance | references/performance.md | Span<T>, async, memory optimization, AOT |
