Network failures and retries are inevitable in distributed systems. Without idempotency, duplicate requests create double charges and data corruption. This guide shows how to implement idempotent APIs in ASP.NET Core using action filters, Redis, and idempotency keys to handle retries safely.
A practical guide to structuring ASP.NET Core APIs for reliable integration and unit testing using clean architecture principles and minimal, production-ready C# code.
Discover how guard clauses in C# simplify validation and error handling. Learn to write fail-fast code, avoid nested conditionals, and keep business logic clean with modern language features and reusable helpers.