description: "In this video you will learn about how to use Data Annotation Attributes to define your validation rules, and how to enable client-side (AJAX) validation."
In this video you will learn about how to use Data Annotation Attributes to define your validation rules, and how to enable client-side (AJAX) validation.
[▶ Watch video (4 minutes)](https://channel9.msdn.com/Blogs/ASP-NET-Site-Videos/mvc2-model-validation)