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

In general, adding to a message in SOA solutions does not break the contract. I believe that as long as you're not using a binary protocol (net.tcp), you'll maintain backward compatibility.

I'm not sure about whether or not it will break your clients using binary bindings, though?