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Difference between WCF and Web service

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Web service is a part of WCF. WCF offers much more flexibility and portability to develop a service when comparing to web service. Still we are having more advantages over Web service, following table provides detailed difference between them.

Features Web Service WCF
Hosting It can be hosted in IIS It can be hosted in IIS, windows activation service, Self-hosting, Windows service
Programming [WebService] attribute has to be added to the class [ServiceContraact] attribute has to be added to the class
Model [WebMethod] attribute represents the method exposed to client [OperationContract] attribute represents the method exposed to client
Operation One-way, Request- Response are the different operations supported in web service One-Way, Request-Response, Duplex are different type of operations supported in WCF
XML System.Xml.serialization name space is used for serialization System.Runtime.Serialization namespace is used for serialization
Encoding XML 1.0, MTOM(Message Transmission Optimization Mechanism), DIME, Custom XML 1.0, MTOM, Binary, Custom
Transports Can be accessed through HTTP, TCP, Custom Can be accessed through HTTP, TCP, Named pipes, MSMQ,P2P, Custom
Protocols Security Security, Reliable messaging, Transactions

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