20 July, 2016. It was a Wednesday. Part of the release of ASP.NET Core is a new DI framework that’s completely integrated with the ASP.NET pipeline. Previous ASP.NET frameworks either had no DI or ...

12 August, 2008. It was a Tuesday. A question came up on the ALT.NET message board asking whether Value Objects should be used across service boundaries. Of course, the conversation took several ...

13 October, 2016. It was a Thursday. A while ago, I blogged about using MediatR to build a processing pipeline for requests in the form of commands and queries in your application. MediatR is a ...

5 May, 2015. It was a Tuesday. CQRS is a simple pattern – two objects for command/queries where once there was one. These days just about every system I build utilizes CQRS, as it’s a natural ...

8 October, 2012. It was a Monday. So I’m over Repositories, and definitely over abstracting your data layer, but where does that leave us? I don’t think creating an abstraction over your ORM provides ...

A survey GETs and queries</ul> In the last post, we looked at encapsulating the interesting part of GET actions (taking request parameters and building a model) into ...

21 August, 2008. It was a Thursday. Services are first-class citizens of the domain model. When concepts of the model would distort any Entity or Value Object, a Service is appropriate. From Evans’ ...

In most of the projects I’ve worked on in the last several years, I’ve put in place a mediator to manage the delivery of messages to handlers. I’ve covered the motivation behind such a pattern in the ...

24 May, 2011. It was a Tuesday. I’ve built a few dozen security mechanisms in my career. Unfortunately, I kept getting it wrong, hence the need to keep building them. Over the years, though, I learned ...

29 April, 2016. It was a Friday. A common question I get asked, especially around a vertical slice architecture, is where does validation happen? If you’re doing DDD, you might want to put validation ...

1 November, 2015. It was a Sunday. Earlier this year I joined a development team which chose Entity Framework for the persistence needs of a new greenfield project. While I’ve worked on a few projects ...

3 September, 2009. It was a Thursday. One of the major structural patterns encountered in DDD (and one of the most argued about) is the Repository pattern. You’ve created a persistent domain model, ...