Become a Patreon and get source code access: https://www.patreon.com/nickchapsas Check out my courses: https://dometrain.com/ Hello everybody I'm Nick and in this ASP.NET Core tutorial I will show you how you can use MediatR's Pipeline Behavior feature to add domain level validation in your API in a very clean way. We will add it using a very intuitive way, without mixing it with our happy path logic in our main IRequestHandler. I will also explain how exactly Pipeline Behaviors work and why they are a perfect fit for this piece of functionality. The validation logic will use FluentValidation. Don't forget to comment, like and subscribe :) Social Media: Follow me on GitHub: http://bit.ly/ChapsasGitHub Follow me on Twitter: http://bit.ly/ChapsasTwitter Connect on LinkedIn: http://bit.ly/ChapsasLinkedIn #aspnetcore #mediatr #tutorial