You work as an Enterprise Application Developer for ABC Inc.

You work as an Enterprise Application Developer for ABC Inc. The company uses Visual Studio .NET 2008 as its application development platform. You create an application using .NET Framework 3.5. The application represents a WCF service. The service will be consumed by clientside code that runs in the Web pages of an ASP.NET AJAX application. You must ensure that data serialization between the service and the application acquires least amount of latency. Which data format will you use to accomplish this?