70-486 Exam Dumps | You are designing a Windows Communication Foundation (WCF) service that uses the Product class. You need

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Question 1/89

You are designing a Windows Communication Foundation (WCF) service that uses the Product class.
You need to update the class to meet the storage requirement.
What should you do? (Each correct answer presents part of the solution. Choose all that apply.)

A. Mark the Product class with the DataContract attribute.

B. Mark the public members of the Product class with the DataContractFormat attribute.

C. Mark the Product class with the CollectionDataContract attribute.

D. Mark the public members of the Product class with the DataMember attribute.

Correct Answer: A,D

Explanation/Reference:
Explanation:
As of .NET 3.5 SP1, you don't haveto add data contract or data member attributes anymore - if you don't then the data contract serializer will serialize all public properties on your class, just like the XML serializer would.
HOWEVER: by not adding those attributes, you lose a lot of useful capabilities:
without [DataContract], you cannot define an XML namespace for your data to live in

without [DataMember], you cannot serialize non-public properties or fields

without [DataMember], you cannot define an order of serialization (Order=) andthe DCS will serialize all

properties alphabetically
without [DataMember], you cannot define a different name for your property (Name=)

without [DataMember], you cannot define things like IsRequired= or other useful attributes

without [DataMember], you cannot leave out certain public properties - all public properties will be

serialized by the DCS
References: http://stackoverflow.com/questions/4836683/when-to-use-datacontract-and-datamember- attributes

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