Every time that I make a change to the contract of my WCF service, I need to have Visual Studio update the service references in all of my client projects.

This process regenerates my client's app.config file and, since I have hand-tuned the "bindings" section of the file, I need to back-up my file and then restore it each time I have VS do the update.

Is there a way to avoid this necessity (eg: have VS update the service reference without rewriting anything in app.config)?

Thanks