Exit 70-599 Pro: Designing and Developing Windows Phone Applications
Question 3 of 5
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Q3 Single choice

You are designing a Windows Phone 7 application that receives data from a Microsoft Windows Communication Foundation (WCF) service. A WCF service call fails when a user receives a phone call after the WCF service call begins but before it completes. You need to ensure that the WCF service call succeeds.

What should you recommend?

  • A

    Handle the deactivated and activated events and retry the WCF service call if it did not complete.

  • B

    Add a try/catch block around the WCF service call and retry the WCF service call if an exception has been caught.

  • C

    Check the results of the completed event and retry the WCF service call if no data exists.

  • D

    Examine the error property of the completed event and retry the WCF service call if an error occurred.

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