Two Web Service experts, Ted Neward and Adrian Trenaman, battle out the pros and cons of Contract First and Code-First here. Ted and Adrian touch on the good and bad points of each. If you're testing Web Services then this is an enlightening 5 minute read.

In the past I was part of a team that tried to implement Contract-First with a large and complex .NET Web Service and it failed us miserably. It turned out to be a manual administration nightmare...That's my experience.