| name | csharp-patterns |
| description | C# architecture reference - frameworks, design patterns, ASP.NET Core, Entity Framework, Blazor, Unity, and production best practices for C# 12/13 and .NET 8/9 (2024-2025). Use when making architectural decisions, reviewing C# code, or selecting libraries. |
| user-invocable | true |
| argument-hint | [frameworks|patterns|architecture|practices|features|all] |
C# Architecture Reference (2024-2025)
Comprehensive reference for C# architectural decisions. Use $ARGUMENTS to focus on a specific area, or browse all sections.
Quick Navigation
- For framework/library selection and comparisons, see frameworks.md
- For design patterns (records, pattern matching, source generators), see design-patterns.md
- For architecture patterns (Clean, Vertical Slice, CQRS, microservices), see architecture.md
- For best practices (nullable types, Span, DI, configuration), see best-practices.md
- For language features (C# 12/13, .NET 9, AOT), see language-features.md
Decision Framework
- Web API: Minimal APIs (simple, fast) vs Controllers (complex, conventions). Default -> Minimal APIs for new projects
- ORM: Default -> EF Core 9. Performance-critical -> Dapper. Micro-ORM -> RepoDB
- Frontend: Server-rendered -> Blazor Server. SPA -> Blazor WASM. Hybrid -> Blazor Hybrid (MAUI)
- Testing: Default -> xUnit + FluentAssertions. Mocking -> NSubstitute. Integration -> TestContainers
- DI: Default -> Microsoft.Extensions.DI (built-in). Advanced -> Autofac
- Messaging: Default -> MassTransit. Simple -> MediatR (in-process). Cloud -> Azure Service Bus SDK
- Mobile/Desktop: Cross-platform -> MAUI. Game dev -> Unity
C# in Production
| Company | Result |
|---|
| Microsoft | .NET powers Azure, Visual Studio, Teams, Office backends |
| Stack Overflow | ASP.NET Core, serves 100M+ monthly visitors |
| Unity | 70%+ of top mobile games use C# scripting |
| Bing | Search infrastructure on .NET |
| GoDaddy | Migrated from Java to .NET, 40% throughput improvement |
| UPS | Package tracking, logistics optimization |
| Goldman Sachs | SecDB successor systems |
C# Evolution
| Version | Key Features |
|---|
| C# 10 (.NET 6) | Global usings, file-scoped namespaces, record structs |
| C# 11 (.NET 7) | Raw string literals, list patterns, required members, generic math |
| C# 12 (.NET 8) | Collection expressions, primary constructors, alias any type |
| C# 13 (.NET 9) | params collections, Lock object, \e escape, extension types (preview) |
| C# 14 (.NET 10) | Extension members, field keyword, null-conditional assignment |
LTS releases: .NET 6 (EOL Nov 2024), .NET 8 (EOL Nov 2026). STS: .NET 9 (EOL May 2026).
Related Skills
