WCF contract changes that affect clients

Question

I was curious if someone could outline which types of WCF contract (interface) changes on the server side would break a client trying to send in a message, and why. I believe W

Answer 1

OK. Question. Due to wrong naming syntax (parameter is specified with capital letter), I would like to adjust some code:

[OperationContract]
public void Foo(string Bar){}

to

[OperationContract]
public void Foo(string bar){}

Would adjusting the capital break contract?