.NET Backend Development Patterns

Production-grade C#/.NET patterns for APIs, MCP servers, and enterprise backends with modern async, DI, and data access practices.

- Covers clean architecture project structure, dependency injection lifetimes, and configuration with IOptions pattern

- Async/await best practices including parallel execution, ConfigureAwait usage, and ValueTask optimization for hot paths

- Entity Framework Core and Dapper repository patterns with query optimization, multi-mapping, and performance considerations

- Multi-level caching with Redis and memory cache, including stale-while-revalidate and cache invalidation strategies

- Unit and integration testing with xUnit, Moq, and WebApplicationFactory; Result pattern for flow control without exceptions

.NET Backend Development Patterns

Master C#/.NET patterns for building production-grade APIs, MCP servers, and enterprise backends with modern best practices (2024/2025).

When to Use This Skill

- Developing new .NET Web APIs or MCP servers

- Reviewing C# code for quality and performance

- Designing service architectures with dependency injection

- Implementing caching strategies with Redis

- Writing unit and integration tests

- Optimizing database access with EF Core or Dapper

- Configuring applications with IOptions pattern

- Handling errors and implementing resilience patterns

Core Concepts

1. Project Structure (Clean Architecture)