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CQRS with MediatR in ASP.NET Core — Full Guide 2026

Learn CQRS with MediatR in ASP.NET Core. Step-by-step tutorial with code examples, best practices, and real-world patterns. Start building today! CQRS with MediatR in ASP.NET Core — The Complete Guide If you've been building ASP.NET Core applications for a while, you've probably noticed how controllers bloat with business logic over time. MediatR in ASP.NET Core solves this by implementing the mediator pattern, which pairs perfectly with the CQRS pattern in C# to create clean, testable, and maintainable applications. In this tutorial, you'll learn how to implement command query separation from scratch with practical, runnable code examples. CQRS — Command Query Responsibility Segregation — is an architectural pattern that separates read operations (queries) from write operations (commands). Instead of using the same model and service layer for both reads and writes, you create dedicated paths for each. MediatR acts as the glue, routing commands and queries to ...