midWCF
What is duplex binding in WCF?
Updated May 6, 2026
Short answer
Duplex binding enables two-way communication between client and service.
Deep explanation
It allows services to call back clients asynchronously using callback contracts.
Real-world example
Live notification systems.
Common mistakes
- Firewall blocking callback channels.
Follow-up questions
- Which binding supports duplex?
- Is it scalable?