Answer
Validation runs after model binding. Attributes and custom validators populate ModelState. MVC may short-circuit execution if validation fails.
Quick Answer
After model binding, ASP.NET Core runs validators in this order: data annotation validators ([Required], [Range]), then IValidatableObject.Validate() for cross-property validation, then custom ValidationAttribute classes. Results populate ModelState. FluentValidation replaces this with a fluent DSL registered as a model validator. The pipeline is extensible via IModelValidator.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ