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How To Implement Validation With MediatR And FluentValidation

Get the source code for this video for FREE → https://the-dotnet-weekly.ck.page/cqr... ☄️ Master the Modular Monolith Architecture: https://bit.ly/3SXlzSt 📌 Accelerate your Clean Architecture skills: https://bit.ly/3PupkOJ 🚀 Support me on Patreon to access the source code:   / milanjovanovic   In this video, I'll show how you can elegantly introduce validation when implementing the CQRS design pattern. We will use MediatR's BehaviorPipeline feature and FluentValidaton for implementing the validation. CQRS gives us a lot of flexibility to introduce additional behavior in the request pipeline. Join my weekly .NET newsletter: https://www.milanjovanovic.tech Subscribe for more: https://www.youtube.com/c/MilanJovano... Chapters 0:00 Validation Result 1:37 Creating the ValidationPipelineBehavior 3:38 Implementing validation with FluentValidation 6:44 Create ValidationResult with reflection 10:30 Creating a command validator with AbstractValidator 12:02 Configuring everything with DI 13:11 Testing our ValidationPipelineBehavior 14:33 Returning errors as Problem Details response 17:28 Alternative approach to returning Validation Result