mid.NET Core
What are filters in ASP.NET Core?
Updated Apr 28, 2026
Short answer
Filters run code before or after controller actions.
Deep explanation
Filters provide cross-cutting concerns like authorization, logging, and exception handling. Types include Action, Authorization, and Exception filters.
Real-world example
Logging request details before execution.
Common mistakes
- Using filters instead of middleware incorrectly.
Follow-up questions
- What is the difference between filters and middleware?
- What is an exception filter?