fluent-validation

To generate FluentValidation rules for nested objects in C#, you define validators for child properties and apply them to the parent object. This ensures high data quality by validating complex nested structures and collections.

The best way to automate validation rule creation for .NET commands and queries is to use a code generation approach that builds validators covering common patterns, custom rules, and nested objects automatically.

Yes, you can create async validators in .NET for complex data integrity checks. Async validation rules allow you to perform database lookups or remote checks without blocking the main application thread.

Yes, this approach supports custom validation patterns for user registration forms. You can generate flexible validators with clear error messaging for inputs like email, password, and address fields.

You need to use FluentValidation instead of data annotations when building an API that requires complex validation logic, such as cross-field rules, async checks, or collection validation, which data annotations cannot easily handle.