EF Core is my favorite ORM for .NET applications. Yet, its many fantastic features sometimes go unnoticed. For example, query splitting, query filters, and interceptors. EF interceptors are interesting because you can do powerful things with them. For example, you can hook into materialization, handle optimistic concurrency errors, or add…

Reporting is essential for business applications like e-commerce, shipping, fintech, etc. One of the most popular document formats for reporting purposes is PDF. PDF stands for Portable Document Format. It’s a file format to present documents (including text formatting and images) independently of application software, hardware, and operating systems. Some…

Layered architectures are the foundation of many software systems. However, layered architectures organize the system around technical layers. And the cohesion between layers is low. What if you wanted to organize the system around features instead? Minimize coupling between unrelated features and maximize coupling in a single feature. Today I…

How should you handle errors in your code? This has been a topic of many discussions, and I want to share my opinion. One school of thought suggests using exceptions for flow control. This is not a good approach because it makes the code harder to reason about. The caller…

Today I want to show you how to use the CQRS pattern to build fast and scalable applications. The CQRS pattern separates the writes and reads in the application. This separation can be logical or physical and has many benefits: Complexity management Improved performance Scalability Flexibility Security I’m also going…

Dependency injection (DI) is one of the most exciting features of ASP.NET Core. It helps us build more testable and maintainable applications. However, ASP.NET Core’s built-in DI system sometimes needs a little help to achieve more advanced scenarios. So I want to introduce you to a powerful library for enhancing…

NServiceBus is a feature-rich messaging framework supporting many different message transports. It’s developed and maintained by Particular Software. And it simplifies the process of building complex distributed systems across various cloud-based queueing technologies. The basic building blocks of NServiceBus are messages and endpoints. A message contains the required information to…

Validation is an essential cross-cutting concern that you need to solve in your application. You want to ensure the request is valid before you consider processing it. Another important question you need to answer is how you approach different types of validation. For example, I consider input and business validation…

You start building a beautiful monolith system. Maybe a modular monolith. The system grows over time, and requirements are ever-changing. Slowly, cracks begin to appear in the system. This could be for organizational reasons and distributing the work across a team. Or it could be because of scaling issues and…