.NET 10 Validation
Note: this is an update to my original post . Introduction I wrote about entity validation in the past, the reason I'm coming back to it is that there are some changes in .NET 10, related to validation. Let's cover the original validation API and then explain what has changed. .NET Validation Validation is implemented in the System.ComponentModel.DataAnnotations namespace. I'll describe it first and then move to the small changes in .NET 10. .NET has featured a way to validate classes and their properties for a long time, the API is called Data Annotations Validation , and it integrates nicely with ASP.NET Core MVC and other frameworks (not Entity Framework Core, as I've talked recently , nor ASP.NET Core Minimal APIs ). It is essentially, but not just, based on a set of attributes, one interface, and a class that performs validations on a target class and its properties, from the validation attributes it contain. The base class for attribute validation is ca...