Validation Patterns in ASP.NET Core Rationale Validation is critical for both security and user experience. Poor validation leads to invalid data, security vulnerabilities, and confusing error messages. These patterns provide a comprehensive approach to validation at multiple layers. Validation Strategy | Layer | Purpose | Technology | |-------|---------|------------| | Client-Side | Immediate feedback, reduce server load | jQuery Validation, HTML5 | | Model Binding | Data type/format validation | Model Binders | | Application | Business rule validation | FluentValidation, DataAnnotations | |…