单项选择题 You are creating an application using Visual Studio 2010. The application consumes a Windows Communication Foundation (WCF) service.You are adding a service reference to the WCF service. You need to ensure that the generated proxy does not block the calling thread when executing a service method. What should you do when adding the service reference? （）

单项选择题 You are developing a Windows Communication Foundation (WCF) REST service to provide access to a library book catalog. The following code segment defines the service contract. (Line numbers are included for reference only.) 01 [ServiceContract()] 02 [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] 03 public Class LibraryService 04 { 05 public Book GetBookByTitle(string title) 06 { 07 ... 08 } 09 10 [WebGet(UriTemplate = "Book/{id}")] 11 public Book GetBookById(string id) 12 { 13 ... 14 } 15 }Library patrons want the ability to search the catalog by title.You need to ensure that the GetBookByTitle method is exposed as a service method.Which code segment should you insert at line 04?（）

单项选择题 You are developing a Windows Communication Foundation (WCF) service. You need to enable security auditing for all events. What should you do?（）