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Windows Communication Foundation (WCF) is an SDK for developing and deploying services on Windows.and it (Code named Indigo) is a programming platform and runtime system for building, configuring and deploying network-distributed services.
WCF provides a runtime environment for your services, enabling you to expose CLR types as services, and to consume other services as CLR types. It is the latest service oriented technology; Interoperability is the fundamental characteristics of WCF.
Windows Communication Foundation (WCF) is unified programming model provided in .Net Framework 3.0. WCF is a combined features of Web Service, Remoting, MSMQ and COM+. WCF provides a common platform for all .NET communication.
It consists of three main points: Address, Binding and Contract. The Client, how to communicate with the service is done by endpoint.
1. Web Service can be hosted in IIS but WCF can be hosted in IIS, windows activation service, Self-hosting, Windows service
2. [WebService] attribute has to be added to the class. In WCF [ServiceContraact] attribute has to be added to the class
3. In Web Srvices[WebMethod] attribute represents the method exposed to client,In WCF [OperationContract] attribute represents the method exposed to client
4. Web services One-way, Request- Response are the different operations supported in web service In WCF One-Way, Request-Response, Duplex are different type of operations supported in WCF
There are four types of Contracts in WCF-
1. Service contracts
2. Data contracts
3. Fault contracts
4. Message contracts
In WCF, all services expose contracts. The contract is a platform-neutral and standard way of describing what the service does. WCF defines four types of contracts.
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