NServiceBus Sagas are a powerful feature that would allow you model long running processes without managing the state on your own or having to juggle correlating messages. Since they manage the state for you and messaging systems being distributed and things running concurrently, they also do concurrency control via Optimistic Concurrency.

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The version 2.7 of Farsi Library is now released through Nuget. As stated in the roadmap last year, I’m now integrating the existing functionality into other 3rd party suite of controls. This version integrates with DevExpress controls and supports the new theme and animations. There are two packages targetting DevExpress version 15.2 and 16.1 so you need to pick the right version. Due to amount of breaking change in each major version, I will need to publish new releases targetting each major DevExpress versions. For minor versions you might be able to get away with assembly redirects, depending on the amount of breaking changes in them.

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Back in 2003 I started to work on a library to use on my line of business applications to address the short-comings around Persian calendar and date controls with proper RightToLeft support. My needs were simple. I was developing business application that needed to be multi-lingual with correct rendering and date displays. Not much to ask, but even simple things like date calculations was not possible as there was not Persian calendar out of the box in .NET framework 1.1.

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Domain event is a very useful concept in Domain Driven Design that allows you to separate concerns in your domain via events. You can also offload the side effects of the actions in your domain to an event handler and let that run asynchronously. For things like sending emails and notifications this makes perfect sense since those are inherently asynchronous anyway.
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In DDD, the value object is used when your entity conceptually does not have an identity and it is all about the data. Now the question of something being a value object or an entity - where we care about the actual Id - is a business question but think about an address in a ordering management system where a customer has addresses. You probably don’t care about the address as something on its own, so you don’t care about it’s identity and as such, two addresses are the same if their values are the same. Another away about the value object, is that it is immutable, meaning if you want to change an address, you need to create a new one and replace an existing address as it is not possible to change an existing address.

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F# Type Providers

You’re going to think I’m jumping on the F# bandwagon as well. Well kind of but that’s not the point of this post. The thing is, people ask me all the time: Why should I even care about F#? I have my own C# language that I love, why go through the burden of learning another language, and more importantly, another way of thinking, as functional programming is not only about the language but more conceptual way of thinking.
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In this series, I’m going to write about some of the challenges we’ve been facing with DDD. If you want to adapt DDD on .NET stack, this hopefully will be useful for you. Along with concepts I’ll talk about what works (or doesn’t) well with EntityFramework, but most of it will still be useful with other ORMs - or even without one.

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One of the four fundamentals of Object-Oriented Programing is Encapsulation which is defined as: “A language mechanism for restricting access to some of the object’s components”. This would help us separate the internal implementation from the publicly accessible surface of the object. The idea is to hide how the object actually work from the outside world, so that we can change the internal without breaking anything as the object still looks the same from the outside.
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Hadi Eskandari

Developer, amateur photographer, coffee snob, husband and father.


Developer and Photographer


Sydney