How to extend wcf service functionality without breaking existing clients (Thinking about old COM rules)


I was thinking about, How to extend service functionality without breaking existing clients (Thinking about old COM rules)


 


COM interface rules still apply to wcf contract.


 


Contract/service level:


 


(1)Adding new method to the service won’t break existing client


 


(2) Implementing new interface won’t break existing clients


 


Only requirement is, we should not change method signature for existing methods


 


Data contract level:


 


We have very good sdk sample to demonstrate, How to maintain data contract versions


 


http://windowssdk.msdn.microsoft.com/library/default.asp?url=/library/en-us/WCF_Con/html/4a0700cb-5f5f-4137-8705-3a3ecf06461f.asp


 


More info:


 


WCF SDK doc


http://windowssdk.msdn.microsoft.com/library/default.asp?url=/library/en-us/WCF_con/html/bf0ab338-4d36-4e12-8002-8ebfdeb346cb.asp


 


http://windowssdk.msdn.microsoft.com/library/default.asp?url=/library/en-us/WCF_con/html/37575ead-d820-4a67-8059-da11a2ab48e2.asp


 


I found yasser blog on Indigo versioning,This may provide more info


 


http://blogs.msdn.com/yassers/archive/2005/06/20/430950.aspx


 

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