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Monday, August 22, 2011

What is WCF ?



·         Windows Communication Foundation  is a programming platform and runtime system for building, configuring and deploying network-distributed services.

·         It is the latest service oriented technology.

·         WCF is a combined features of Web Service, Remoting, MSMQ and COM

WCF Advantaged:

  1. WCF is interoperable with other services when compared to .Net Remoting,where the client and service have to be .Net.
  2. WCF services provide better reliability and security in compared to ASMX web services.
  3. In WCF, there is no need to make much change in code for implementing the security model and changing the binding. Small changes in the configuration will make your requirements.
  4. WCF has integrated logging mechanism, changing the configuration file settings will provide this functionality.

5.      WCF services can be debugged now in Visual Studio 2008 /2010. Wcfsvchost.exe will do it for you because service will be self hosted when you start debugging.

WCF vs WebService:

Wcf and Webservice have some difference  


Web Service



It can be hosted in IIS

It can be hosted in IIS, windows activation service, Self-hosting, Windows service


[WebService] attribute has to be added to the class

[ServiceContraact] attribute has to be added to the class


[WebMethod] attribute represents the method exposed to client

[OperationContract] attribute represents the method exposed to client


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


System.Xml.serialization name space is used for serialization

System.Runtime.Serialization namespace is used for serialization


XML 1.0, MTOM(Message Transmission Optimization Mechanism), DIME, Custom

XML 1.0, MTOM, Binary, Custom


Can be accessed through HTTP, TCP, Custom

Can be accessed through HTTP, TCP, Named pipes, MSMQ,P2P, Custom



Security, Reliable messaging, Transactions


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