[单选] A Windows Communication Foundation (WCF) solution exposes the following contract over an HTTP connection.[ServiceContract]public interface IDataService{ [OperationContract] string GetData();}Existing clients are making blocking calls to GetData. Calls to GetData take five seconds to complete.You need to allow new clients to issue non-blocking calls to get the data, without breaking any existing clients. What should you do?（）

You work as the application developer at Certkiller .com. Certkiller .com uses Visual Studio.NET 2005 as its application development platform.You have recently finished development of a class named TestReward and package the class in a .NET 2.0 assembly named TestObj.dll. After you ship the assembly and it is used by client applications， you decide to move the TestReward class from TestObj.dll assembly to the TestRewardObj.dll Assembly. You are to ensure when you ship the updated TestObj.dll and TestRewardObj.dll assemblies that the client applications continue to work and do not require recompiling.What should you do？（）  The TypeForwardedTo attribute should be used。  The TypeConvertor.ConvertTo method should be used。  The InternalsVisibleTo attribute should be used。  The Type Convertor.ConvertFrom method should be used。 情感障碍 MRPⅡ与MRP的本质区别在于它包含了（）的能力。 JD型深井泵叶轮的轴向间隙应如何调整？ 下列项目中不需要进行隐蔽工程验收的项目是（）。 保温层的隔气和排气措施。 接缝的密封处理。 玻璃采光顶铺装。 变形缝。 A Windows Communication Foundation (WCF) solution exposes the following contract over an HTTP connection.[ServiceContract]public interface IDataService{ [OperationContract] string GetData();}Existing clients are making blocking calls to GetData. Calls to GetData take five seconds to complete.You need to allow new clients to issue non-blocking calls to get the data, without breaking any existing clients. What should you do?（）