What is CORS in ASP.NET Web API?

Updated Apr 28, 2026

Short answer

CORS allows cross-origin requests.

Deep explanation

CORS enables browsers to call APIs from different domains while enforcing security policies.

Real-world example

Frontend calling API from different domain.

Common mistakes

  • Allowing all origins in production.

Follow-up questions

  • What is origin?
  • Why CORS?

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