What are Validation Annotations?

[beingchinmay]

Data annotations are attributes you can find in the "System.ComponentModel.DataAnnotations" namespace. These attributes provide server-side validation, and the framework also supports client-side validation when you use one of the attributes on a model property. You can use four attributes in the DataAnnotations namespace to cover the common validation scenarios, Required, String Length, Regular Expression and Range.

[richardmsmith]

In the.Net Framework The System.ComponentModel.DataAnnotations namespace provides attribute classes that are used to define metadata for ASP.NET MVC and ASP.NET data controls.