Code Quality & Best Practices

Write production-quality .NET Core code — naming conventions, SOLID principles, code analysis, and engineering excellence standards.

50 min•By Priygop Team•Last updated: Feb 2026

SOLID Principles in Practice

Single Responsibility: Each class has one reason to change — OrderService handles orders, EmailService handles emails. If a class name needs 'And' or 'Manager', it's doing too much
Open/Closed: Classes are open for extension, closed for modification — use interfaces, abstract classes, and strategy pattern. Add new payment methods without changing existing code
Liskov Substitution: Derived classes must be substitutable for base classes — if IRepository has GetById(), the InMemoryRepository and SqlRepository must both behave consistently
Interface Segregation: Clients shouldn't depend on methods they don't use — split IUserService into IUserReader and IUserWriter. Small, focused interfaces
Dependency Inversion: High-level modules depend on abstractions, not concrete implementations — controllers depend on IOrderService, not SqlOrderService. Enable testing and flexibility

.editorconfig: Enforce coding style across the team — naming conventions (PascalCase for public, _camelCase for private fields), formatting rules, analyzers
Nullable Reference Types: Enable <Nullable>enable</Nullable> — compiler warns on potential null dereference. Eliminate NullReferenceException at compile time
Code Analyzers: Roslyn analyzers catch issues at build time — StyleCop, SonarAnalyzer, Microsoft.CodeAnalysis. Treat warnings as errors in CI
Architecture Tests: NetArchTest verifies layer dependencies — Domain must not reference Infrastructure. Catch architectural violations automatically
PR Review Checklist: Does it have tests? Is it backward compatible? Are secrets properly managed? Is error handling appropriate? Is logging adequate?
Technical Debt: Track with SonarQube — measure code coverage, duplications, complexity, maintainability. Set quality gates in CI pipeline