https://www.entityframeworktutorial.net/code-first/key-dataannotations-attribute-in-code-first.aspx
Data Annotations: Key Attribute in EF 6 & EF Core
Learn about the [Key] data annotations attribute in EF 6 and EF Core.
data annotationskeyattributeefcore
https://asp.mvc-tutorial.com/pt/535/models/manual-model-validation-with-data-annotations/
Manual Model validation with Data Annotations - The ASP.NET Core MVC Tutorial
asp net core mvcmodel validationdata annotations