mid.NET Core
What is model validation in ASP.NET Core?
Updated Apr 28, 2026
Short answer
Model validation ensures incoming data meets defined rules.
Deep explanation
Validation is performed using data annotations or custom validators before controller logic executes. It helps maintain data integrity.
Real-world example
Validating user registration forms.
Common mistakes
- Not checking ModelState.IsValid.
Follow-up questions
- What is FluentValidation?
- What happens if validation fails?