With WCF, provided that you’re using the DataContractSerializer and not the NetDataContractSerializer, you have a certain degree of protection against data contract changes from the client’s perspective.
Existing contracts will still work if existing members are not removed from the data contract, which means you are free to add new members to the data contract on the server side without affecting existing clients. This gives you some backward compatibility and allows you to incrementally evolve your data contracts in a non-breaking way.
Round-tripping occurs when data passes from a new version to an old version and back to the new version of a data contract. Round-tripping guarantees that no data is lost. Enabling round-tripping makes the type forward-compatible with any future changes supported by the data contract versioning model.
To enable round-tripping your type must implement the IExtensibleDataContract interface and add the ExtensionData property of ExtensionDataObject type (see the MSDN article in the References section for an example).
It’s worth noting that the data stored in the ExtensionData property is not public retrievable and is only used by the WCF infrastructure.
And finally, to turn it off:
The round-tripping feature may be turned off, either by setting ignoreExtensionDataObject to true in the DataContractSerializer constructor or by setting theIgnoreExtensionDataObject property to true on the ServiceBehaviorAttribute. When this feature is off, the deserializer will not populate the ExtensionData property, and the serializer will not emit the contents of the property.
I specialise in rapidly transitioning teams to serverless and building production-ready services on AWS.
Are you struggling with serverless or need guidance on best practices? Do you want someone to review your architecture and help you avoid costly mistakes down the line? Whatever the case, I’m here to help.
Check out my new course, Complete Guide to AWS Step Functions. In this course, we’ll cover everything you need to know to use AWS Step Functions service effectively. Including basic concepts, HTTP and event triggers, activities, callbacks, nested workflows, design patterns and best practices.
Here is a complete list of all my posts on serverless and AWS Lambda. In the meantime, here are a few of my most popular blog posts.
- Lambda optimization tip – enable HTTP keep-alive
- You are thinking about serverless costs all wrong
- Many faced threats to Serverless security
- We can do better than percentile latencies
- I’m afraid you’re thinking about AWS Lambda cold starts all wrong
- Yubl’s road to Serverless
- AWS Lambda – should you have few monolithic functions or many single-purposed functions?
- AWS Lambda – compare coldstart time with different languages, memory and code sizes
- Guys, we’re doing pagination wrong