Csharp Dotnet Review

C# / .NET Code Review

When to Use

• Reviewing C#/.NET code (ASP.NET Core, EF Core, Minimal APIs)
• Evaluating .NET architecture patterns (Clean Architecture, CQRS, MediatR)
• Azure service integration review

Review Checklist

Architecture & Patterns

• [ ] Clean Architecture: Domain independent of infrastructure
• [ ] Dependency Injection used throughout (no new Service())
• [ ] CQRS separation when appropriate (Commands vs Queries)
• [ ] MediatR or similar for decoupled handlers
• [ ] Repository pattern for data access abstraction
• [ ] Options pattern for configuration (IOptions)

C# Best Practices

• [ ] async/await used correctly (no .Result or .Wait())
• [ ] CancellationToken propagated through async chains
• [ ] IDisposable implemented for unmanaged resources
• [ ] null handled with nullable reference types (?, ??, ?.)
• [ ] Records used for immutable DTOs
• [ ] sealed classes where inheritance not needed
• [ ] readonly for immutable fields
• [ ] Pattern matching instead of type casting

EF Core

• [ ] No N+1 queries (use .Include() or .AsSplitQuery())
• [ ] AsNoTracking() for read-only queries
• [ ] Indexes defined on frequently queried columns
• [ ] Migrations tested and reversible
• [ ] Connection pooling configured
• [ ] Query filters for soft delete / multi-tenancy

Security

• [ ] [Authorize] on all protected endpoints
• [ ] Input validation with data annotations or FluentValidation
• [ ] Anti-forgery tokens for forms
• [ ] CORS configured restrictively
• [ ] User secrets / Azure Key Vault for credentials
• [ ] No SQL string concatenation (parameterized queries)

Performance

• [ ] Response caching where appropriate
• [ ] IMemoryCache or IDistributedCache for hot data
• [ ] Minimal API for high-throughput endpoints
• [ ] System.Text.Json configured (not Newtonsoft unless needed)
• [ ] Pagination on list endpoints
• [ ] Background tasks via IHostedService / Hangfire

Output Format

## .NET Review: [Component]
**Health Score**: X/10

### Critical Issues
- [Issue with fix]

### Improvements
- [Suggestion with example]

### Architecture Notes
- [Pattern observations]

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: camilooscargbaptista
• Source: camilooscargbaptista/cto-toolkit
• License: MIT

Install and usage instructions live in the source repository linked above.