Unleash Your Functional Modeling Superpowers | C# Tutorial

Download the source code for this demo at Patreon: https://www.patreon.com/posts/unleash-your-84639661
How about creating a more concise and expressive rich domain model using C# and .NET? Let’s face it: The C# programming language is changing. It is adopting functional programming paradigm, with many programmers facing difficulties to follow, some even saying: “This is not the C# I know!”. Don’t be one of them. Embrace functional design in C#!
This video will teach you some functional parts of the latest C# and how you can leverage them as part of effective domain modeling beyond the reach of the traditional object-oriented method.
Enter Functional Programming – a paradigm where applications are structured based on functions and immutable data. A concept seemingly overlooked in the past, it’s been making waves in the .NET community for the last 15 years.
This tutorial demonstrates a practical shift from an Object-Oriented design to a functional model in an ASP.NET Core application. Here’s a sneak peek: we introduce a new immutable model, which simplifies the process of producing and manipulating the domain objects in the application. What used to be a convoluted procedure in the object-oriented model, is now turned into a neat mapping expression thanks to powerful pattern matching constructs.
By the end of this demo, all functional elements of the latest C# specification fit into place: Record types, discriminated unions (based on C# records), type test and set expressions, C# 11 list patterns, immutable collections, and custom immutable classes. And behavior? Implementing behavior in the new, functional model, will reduce code by half, compared to the previous object-oriented version.
The future of C# is here, and it is functional!

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Hi, I’m Zoran, I have more than 20 years of experience as a software developer, architect, team lead, and more. I have been programming in C# since its inception in the early 2000s. Since 2017 I have started publishing professional video courses at Pluralsight and Udemy and by this point, there are over 100 hours of the highest-quality videos you can watch on those platforms. On my YouTube channel, you can find shorter video forms focused on clarifying practical issues in coding, design, and architecture of .NET applications.❤️
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