I started to play with the SL3 with wcf, but keep getting the error when using default clientconfig file

Could not find default endpoint element that references contract ‘ProjectName.ServiceReference1.IService1′ in the ServiceModel client configuration section. This might be because no configuration file was found for your application, or because no endpoint element matching this contract could be found in the client element.

If you look at the config file you’ll see contract=”ServiceReference1.IService1″. This needs to be a fully qualified namespace, and should be changed to contract=”ProjectName.ServiceReference1.IService1″ (or whatever namespace is specified in your Reference.cs file)