DRAG DROP
Exhibit:
[ServiceContract]
public interface IDataService
[OperationContract]
string PassGuideData();
There is a WCF (Windows Communication Foundation) solution PassGuideSol, which is exposing
the contract being displayed in the exhibit.
At the moment calls to PassGuideData has a 10 seconds completion time.
Current client calls makes blocking calls to PassGuideData.
New clients must be allowed to make non-blocking calls to obtain data from PassGuideData.
At the same time the existing clients must not break.
How can this be achieved?
Answer: 
Explanation: