When the service or client serializes parameters and return values to a message, it writes them within infrastructure-provided XML elements and are wrapped. Sometimes developers do not want the service to write these extra XML elements. The WebMessageBodyStyle enumeration specifies whether to wrap parameters and return values.
This enumeration is used with the WebGetAttribute and the WebInvokeAttribute to control how the data passed to and from a service operation appears on the wire. Both attributes default to Bare.