Does adding a method to a WCF ServiceContract break existing clients?

Question

We have an existing ServiceContract

[ServiceContract(Namespace = \"http://somesite.com/ConversationService\")]
public interface IConversationService
{
               


        

Answer 1

I just tested this with a WCF client Windows app (UWP) and it continued to work after updating the WCF service application. So no: as previously answered, your clients will not break when you add a method.

I thought it was worth mentioning, however, how easy it is to update your service clients with Visual Studio 2015:

1. Make sure your WFC service is running.

2. Simply go to the Solution Explorer,

3. Expand Service References

4. Right-click on your service reference

5. Click Update Service Reference

6. If you get an error message, repeat the last step. I had to try a few times for some reason.