ASP.NET 6.0 - Build Hands-On Web Projects - Add Validation Attributes to Customer Class

This lecture covers adding data annotation validation attributes to a customer model, focusing on server-side validation to ensure data correctness. It explains the importance of both client-side and server-side validation, and demonstrates how to implement validation attributes in C#. The lecture also discusses customizing error messages and using regular expressions for validating email and phone fields.

What is the significance of using a friendly error message for validation?

Describe how a regular expression can be used for validating a telephone number.

How does the regular expression for validating an email address work?