Attributes that affect compiled code aren’t a new thing for C#, so this would align with existing patterns. And if we ever get declarative parameter validation, it would look something like this.

Take advantage of the specification design pattern in C# to improve the ... can be reused with similar validation logic across application parts. You can avoid code duplication and ensure ...

This article discusses how to use model validation in minimal APIs. To work with the code examples provided in this article, you should have Visual Studio 2022 installed in your system.