juniorWCF
What is a data contract in WCF?
Updated May 6, 2026
Short answer
Data contract defines how data is serialized in WCF.
Deep explanation
It uses [DataContract] and [DataMember] attributes to control serialization.
Real-world example
Transferring user objects between client and server.
Common mistakes
- Not marking properties with DataMember.
Follow-up questions
- What serializer does WCF use?
- Is XML required?