fcbb435a_ofessional_Growth__Leadership___Description
[Title] Versioning [Category] Data Contracts [Last Updated] 9/7/2006 [Description] 
WCF lets the client and the service version independently their definitions of the same data contract. If the client sends a type with a missing member the service expects, the missing member on the service side will be initialized to its default value. If the data type contains a member the service is unaware of, it will be silently ignored. In addition, WCF allows both sides to explicitly require a particular data member or else fail the call. The download contains three solutions demonstrating these behaviors.
IDesign: Excellence. Professional Growth. Leadership.